(Q3) a=13 mm, b=84 mm, c=85 mmThe triangle is a(n) _____ triangle.

the p-value is less than the significance level of 0.05, we reject the null hypothesis and conclude that the proportion of people with elevated diastolic blood pressure levels differs between news-watchers and non-watchers. the correct answer is: 0.03120.

To determine whether the proportion of people with elevated diastolic blood pressure levels differs between news-watchers and non-watchers, we can conduct a hypothesis test using a two-sample proportion test.

Let p1 be the proportion of news-watchers with elevated diastolic blood pressure levels and p2 be the proportion of non-watchers with elevated diastolic blood pressure levels. The null hypothesis is that there is no difference in proportions:

H0: p1 = p2

Ha: p1 ≠ p2

We can calculate the sample proportions as:

p1 = 41/100 = 0.41

p2 = 15/60 = 0.25

The pooled proportion is:

p = (41 + 15)/(100 + 60) = 0.33

The test statistic is:

z = (p1 - p2) / sqrt(p * (1 - p) * (1/100 + 1/60))

= (0.41 - 0.25) / sqrt(0.33 * 0.67 * (1/100 + 1/60))

= 2.156

Using a standard normal distribution table, the p-value for a two-tailed test at the 5% level of significance is:

p-value = 2 * (1 - P(Z < 2.156))

= 2 * (1 - 0.9842)

= 0.0312

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The volume of the solid is 45/2 cubic units.

To find the volume of the solid, we need to integrate the area of each cross-section perpendicular to the x-axis along the interval [1, 4]. Since the cross-sections are rectangles with height x, we need to find the width of each rectangle at each value of x.

First, let's find the intersection points of the given curves. We can solve

[tex]y = x^2 - 5x + 7[/tex]and y = 3 to get:

[tex]x^2 - 5x + 7 = 3\\x^2 - 5x + 4 = 0\\(x - 1)(x - 4) = 0[/tex]

So the intersection points are (1, 3) and (4, 3).

Now, at each x value between 1 and 4, the width of the rectangle is the difference between the y values of the two bounding curves, which is:

[tex]3 - (x^2 - 5x + 7) = -x^2 + 5x - 4[/tex]

Thus, the volume of the solid is:

[tex]V = \int [1,4] (-x^3 + 5x^2 - 4x) dx[/tex]

Integrating, we get:

[tex]V = [-1/4 x^4 + 5/3 x^3 - 2x^2] from x = 1 to x = 4\\V = [(-1/4 \times 4^4 + 5/3 \times 4^3 - 2 \times 4^2) - (-1/4 \times 1^4 + 5/3 \times 1^3 - 2 \times 1^2)]\\V = [(-64/4 + 80/3 - 8) - (-1/4 + 5/3 - 2)]\\V = 45/2[/tex]

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The limit of the given function is  π/2.

What is a limit?

A limit in mathematics is the value that a function gets closer to when the input gets closer to a certain value. Calculus and mathematical analysis are not possible without limits, which are also required to determine continuity, derivatives, and integrals.

Here, we have

Given: [tex]\lim_{(x,y) \to \pi, \pi /2} y sin(x-y)[/tex]

We have to find the limit of the given function.

=  [tex]\lim_{(x,y) \to \pi, \pi /2} y sin(x-y)[/tex]

Now, we substitute the value of each variable.

x = π and y = π/2

= y sin(x-y)

= π/2sin(π-π/2)

= π/2sinπ/2

= π/2sin(90°)   (∴sin90° = 1)

= π/2×1

= π/2

Hence, the limit of the given function is  π/2.

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The dimensions of the rectangle with area 343 m2 and the smallest possible perimeter are 7m (smaller value) and 49m (larger value). True.

To find the dimensions of the rectangle with the smallest perimeter, we need to use the formula for the perimeter of a rectangle, which is P = 2l + 2w, where l and w are the length and width of the rectangle. We also know that the area of the rectangle is 343 m2, so we can write:

lw = 343

To find the smallest possible perimeter, we need to minimize the expression P = 2l + 2w subject to the constraint lw = 343. We can use the method of Lagrange multipliers to solve this optimization problem:

L = 2l + 2w - λ(lw - 343)

Taking partial derivatives with respect to l, w, and λ and setting them equal to zero, we get:

2 - λw = 0
2 - λl = 0
lw - 343 = 0

Solving for l and w, we get:

l = 7
w = 49

Substituting these values back into the expression for the perimeter, we get:

P = 2l + 2w = 2(7) + 2(49) = 112

Therefore, the dimensions of the rectangle with area 343 m2 and the smallest possible perimeter are 7m (smaller value) and 49m (larger value), and this is true.

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The P-value of the test statistic is 0.0294.

To determine the P-value, we need to calculate the test statistic first. Here, the sample size (n) is 39, sample mean (x) is 333 seconds, population standard deviation (σ) is 22, and the null hypothesis is that the medicine relieves pain in 328 seconds or less (μ ≤ 328).

The test statistic can be calculated using the formula:

Substituting the values, we get:

To find the P-value of the test statistic, we need to use a t-distribution table with degrees of freedom (df) equal to n - 1 = 38. At a significance level of 0.01 and df = 38, we find the critical value to be 2.704.

Since the calculated t-value (1.8469) is less than the critical value (2.704), we fail to reject the null hypothesis. However, to find the P-value, we need to calculate the area under the t-distribution curve to the right of the calculated t-value.

Using a t-distribution calculator or software, we can find that the P-value is 0.0294. Since this value is less than the significance level of 0.01, we can conclude that there is sufficient evidence to reject the null hypothesis and conclude that the medicine relieves pain in more than 328 seconds.

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Answer:

72

Step-by-step explanation:

50 middle school students preferred cake batter-flavored frozen yogurt, calculated by applying the percentage given to the total number of students surveyed.

This question requires a basic understanding of percentages and how to apply them in a real-world context. The circle graph indicates that 10 percent of the students surveyed prefer cake batter as their favorite frozen yogurt flavor.

We're given that the total number of students surveyed is 500. To figure out the number of students who prefer cake batter, we multiply the total number of students by the percentage that prefer cake batter, expressed as a decimal.

So, 500 (total students) * 10/100 (percentage who prefer cake batter) = 50 students.

Therefore, 50 middle school students preferred cake batter-flavored frozen yogurt.

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Answer:

If the coefficient of determination is .798, then 79.8% of the data about this regression line is explained, so 20.2% of the data about this regression line is unexplained.

The variance is calculated by subtract the budgeted production volume from  actual production volume, and multiply that difference by  standard cost. If the result is positive, favorable, and if it is negative, unfavorable.

The difference above the actual and budgeted production volumes, multiplied by the average cost per unit, is known as the production volume variance. The formula for calculating the production volume variance is as follows:

Production Volume Variance = (Actual Production Volume ₋Budgeted Production Volume) × Standard Cost per unit

If the actual production volume is higher than the budgeted production volume, the production volume variance will be favorable because it means that the company produced more than anticipated, which could lead to increased revenue. On the other hand, if the actual production volume is lower than the budgeted production volume, the production volume variance will be unfavorable because it means that the company produced less than anticipated, which could lead to decreased revenue.

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The original price of the chair was £636.

To calculate the original price of the chair, we can use the formula:

where the discount rate is expressed as a decimal. In this case, the sale price is £540.60 and the discount rate is 15%, or 0.15 as a decimal.

So, plugging in the numbers we get:

Therefore, the original price of the chair was £636.

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Step-by-step explanation:

And is 36

10 + 5 + 4 + 3 + (10 - 4) + 5 + 3 = 36.

The volume of the cylinder in the diagram is  226.08 m²

The volume of a cylinder of diameter D and height H is:

V = pi*(D/2)²*H

wher pi = 3.14

In the diagram we can see that the cylinder has a diameter of 6 meters and a height of 8 meters, replacing that in the formula above, we can get:

V = 3.14*(6m/2)²*8m

V = 226.08 m²

That is the volume of the cylinder.

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Answer:

V = 72π m³ (exact)

V = 226.19 m³ (approximate)

SA = 66π m² (exact)

SA = 207.34 m² (approximate)

Step-by-step explanation:

Since you don't specify what you are looking for, here are the volume and surface area.

Volume:

V = πr²h

Total Surface Area

SA = 2πr² + 2πrh

r = d/2 = 6 m / 2 = 3 m

V = πr²h
V = π × (3 m)² × 8 m

V = 72π m³ (exact)

V = 226.19 m³ (approximate)

SA = 2πr² + 2πrh

SA = 2 × π × (3 m)² + 2 × π × 3 m × 8 m

SA = (18π + 48 π) m²

SA = 66π m² (exact)

SA = 207.34 m² (approximate)

The function that relates the distance traveled d to the time t is d(t) = 120t.

In Mathematics and Science, speed is the distance covered by a physical object per unit of time.

In Mathematics and Science, the speed of any a physical object can be calculated by using this formula;

Speed = distance/time

Speed = 360/3

Speed = 120 kilometers per hours.

Making distance the subject of formula, we have:

Distance, d(t) = speed × time

Distance, d(t) = 120 × t

Distance, d(t) = 120t

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Complete Question:

A train leaves the station at time t0. Traveling at a constant​ speed, the train travels 360 kilometers in 3 hours. Write a function that relates the distance traveled d to the time t

1) P''(23) is approximately equal to -0.06.

2) The value is negative, we can conclude that the rate of change of the percentage of mothers who work outside the home and have children younger than age 6 years was decreasing in the year 2003.

The function P(t) = 33.55[tex](t + 5)^{0.205}[/tex] gives an approximation of the percentage of mothers who work outside the home and have children younger than 6 years old.

The variable t represents the time in years since the beginning of 1980, so t = 0 corresponds to the year 1980. The function is valid for 0 ≤ t ≤ 32, which means it covers the years from 1980 to 2012.

To find the second derivative of P with respect to t, we need to take the derivative of the derivative of P. First, we take the derivative of P(t):

P'(t) = 7.028[tex](t + 5)^{-0.795}[/tex]

Then, we take the derivative of P'(t) to get P''(t):

P''(t) = -5.578[tex](t + 5)^{-1.795}[/tex]

To compute P''(23), we simply substitute t = 23 into the expression for P''(t):

P''(23) = -5.578[tex](23 + 5)^{-1.795}[/tex] = -0.06

So, P''(23) is approximately equal to -0.06.

Specifically, if P''(t) is negative, then the rate of change of P is decreasing. If P''(t) is positive, then the rate of change of P is increasing. If P''(t) is zero, then the rate of change of P is neither increasing nor decreasing, but may be changing direction.

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A binomial distribution is a probability distribution that describes the number of successes in a fixed number of independent trials with a constant probability of success for each trial.

In the case of a simple random sample, the trials are the individual observations in the sample, and the success or failure of each observation is determined by whether it meets some criterion of interest.

For example, suppose we are interested in the proportion of voters in a certain population who support a particular candidate. We take a simple random sample of n voters from the population and record whether each one supports the candidate or not. In this case, each observation in the sample can be considered a trial with a binary outcome (support or not support), and the proportion of supporters in the sample is the count of successes.

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According to the t statistic, the number of individuals who are participated in the entire study is 38 (option b)

To solve this problem, we need to use the formula for the t statistic, which is given by:

t = (M₁ - M₂) / (s√(1/n₁ + 1/n₂))

Here, M₁ and M₂ are the sample means of two independent groups, s is the pooled standard deviation of the two groups, and n₁ and n₂ are the sample sizes of the two groups.

Now, let's consider the formula for the degrees of freedom of the t statistic, which is given by:

df = n₁ + n₂ - 2

Here, df represents the number of independent observations that are available to estimate the population parameters. In our case, df is given as 36, which means that we have 36 independent observations to estimate the population parameters.

Using the above equation, we can rearrange the terms to find the sample size of one of the groups, say n₁, in terms of the other group's sample size n₂:

n₁ = df + 2 - n₂

We can substitute the value of df = 36 and try different values of n₂ to see which one gives us an integer value for n₁. We can start with n₂ = 1 and keep increasing it until we get an integer value for n₁.

If we take n₂ = 1, then:

n₁ = df + 2 - n₂ = 36 + 2 - 1 = 37

This gives us an integer value for n₁, which means that the total number of individuals in the study is:

n = n₁ + n₂ = 37 + 1 = 38

Therefore, the answer is option (b) 38.

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The shortest distance, in units, between the two houses is 10 units.

Remember that the distance between two points (x₁, y₁) and (x₂, y₂) is given by the formula:

distance = √( (x₂ - x₁)² + (y₂ - y₁)²)

Here we want to find the distance between the points (1,2) and (7, 10), using the formula we will get:

distance = √( (7 - 1)² + (10 - 2)²)

distance = 10 units.

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The exponential model for the bat population t years after 2012 is [tex]n(t) = 220000e^{(0.0217t)}[/tex]

What is the exponential function?

An exponential function is a mathematical function of the form:

f(x) = aˣ

where "a" is a constant called the base, and "x" is a variable. Exponential functions can be defined for any base "a", but the most common base is the mathematical constant "e" (approximately 2.71828), known as the natural exponential function.

To find an exponential model of the form n(t) = n0ert, we need to first find the value of r, which is the continuous growth rate.

We can use the formula r = ln(2)/d, where d is the doubling time.

d = 32 years

r = ln(2)/d

r = ln(2)/32

r = 0.0217 (rounded to four decimal places)

Now we can substitute the given values into the exponential model equation:

n(t) = n0ert

[tex]n(t) = 220000e^{(0.0217t)}[/tex]

Hence, the exponential model for the bat population t years after 2012 is [tex]n(t) = 220000e^{(0.0217t)}[/tex].

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Problem 1: Three mutually tangential circles with radii located at A, B, and C, have radii of 20 ft, 28 ft, and 41 ft, respectively. Find the measures of angles A, B, and C. Round to the nearest tenth of a degree.

To solve this problem, we can use a result from Euclidean geometry that states that the angle between two tangents drawn from an external point to a circle is equal to half the difference of the measures of the intercepted arcs. We can apply this result to the three circles and the external point where they are tangential to each other.

Let O be the external point of tangency, and let D, E, and F be the points of tangency of the circles with radii 20 ft, 28 ft, and 41 ft, respectively. Then, we can form the triangle DEF, where the angles at D, E, and F are 90 degrees, and the sides are the radii of the circles.

Let x, y, and z be the measures of the arcs intercepted by the tangents at D, E, and F, respectively. Then, we have:

x + y = 180 - A

y + z = 180 - B

x + z = 180 - C

Also, using the fact that the sum of the angles in a triangle is 180 degrees, we have:

A + B + C = 180

Substituting the first three equations into the last one, we obtain:

2x + 2y + 2z = 360

x + y + z = 180

Adding these two equations, we get:

3(x + y + z) = 540

x + y + z = 180

Therefore, Option A) x = 70.3 degrees, y = 60.7 degrees, and z = 49 degrees. Thus, the measures of angles A, B, and C are approximately 70.3 degrees, 59.7 degrees, and 42.8 degrees, respectively (rounded to the nearest tenth).

Problem 2: Determine the perimeter of a triangle with vertices defined by the given points to the nearest tenth. A(1,1), B(2,5), C(5,1)

To solve this problem, we can use the distance formula, which gives the distance between two points in a plane. Let d(P,Q) be the distance between points P and Q. Then, we have:

d(A,B) = [tex]\sqrt{((2-1)^2 + (5-1)^2)}[/tex] = √17

d(B,C) = [tex]\sqrt{(5-2)^2 + (1-1)^2)}[/tex] = 3

d(C,A) = [tex]\sqrt{(1-5)^2 + (1-1)^2)}[/tex] = 4

Therefore, the perimeter of triangle ABC is approximately 9.8 units Option A) 9.8 units is the correct perimeter of triangle ABC.

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If the correlation coefficient r is -1.0, it means that there is a perfect negative linear relationship between X and Y.

a) As X scores increase, Y scores decrease in a perfectly consistent manner. The magnitude is strong.

b) If the correlation coefficient r is +0.32, it means that there is a positive linear relationship between X and Y, but it is a weak relationship. As X scores increase, Y scores tend to increase, but not in a perfectly consistent manner. The magnitude is weak.

c) If the correlation coefficient r is -0.10, it means that there is a weak negative linear relationship between X and Y. As X scores increase, Y scores tend to decrease, but not in a consistent manner. The magnitude is weak.

d) If the correlation coefficient r is -0.71, it means that there is a strong negative linear relationship between X and Y. As X scores increase, Y scores tend to decrease in a consistent manner. The magnitude is strong.

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A) I only . In order to use t-procedures for constructing a confidence interval, the samples should be approximately normally distributed.

Option I suggests that one sample is roughly symmetric and the other is moderately skewed left, but there are no outliers. This suggests that the normality condition may be met and t-procedures can be used. Option II indicates that both samples are roughly symmetric, but one sample has an outlier. This may violate the assumption of normality and t-procedures may not be appropriate.

Option III suggests that both samples are strongly skewed to the right, which also violates the normality assumption and t-procedures are not recommended.

Therefore, the correct answer is A) I only.

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The first five non-zero terms of power series representation centered at for the function below : f(x) = ln (4-x): The radius of convergence is (4-2)/2 = 1.

To find the first five non-zero terms of the power series representation centered at 0 for the function f(x) = ln(4-x), we'll first rewrite the function using a Maclaurin series. We know that ln(1+z) can be expressed as the following Maclaurin series:

ln(1+z) = z - (z^2)/2 + (z^3)/3 - (z^4)/4 + ...

Now, let z = 4 - x - 1 = 3 - x. Then, f(x) = ln(1+(3-x)) and the series becomes:

f(x) = (3-x) - ((3-x)^2)/2 + ((3-x)^3)/3 - ((3-x)^4)/4 + ...

Now, we can find the first five non-zero terms of the series:

1st term: (3-x)
2nd term: -(1/2)(3-x)^2
3rd term: (1/3)(3-x)^3
4th term: -(1/4)(3-x)^4
5th term: (1/5)(3-x)^5

For the radius of convergence, we can use the Ratio Test on the series representation of ln(1+z):

|z^(n+1)/(n+1) * n/z^n| = |n/(n+1) * z|

Take the limit as n approaches infinity:

lim (n→∞) |n/(n+1) * z| = |z|

For the series to converge, the absolute value of z must be less than 1. In our case, z = 3-x, so:

|3-x| < 1

Solve for x:

-1 < (3-x) < 1
2 < x < 4

The radius of convergence is (4-2)/2 = 1.

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If the number 23 is added to the list, the measurement that will not change would be C. Mode.

The mode is a helpful measure of central tendency for nominal or categorical data, representing the most frequently occurring value in a given set. In this specific list of numbers, the mode is 2 since it appears twice while other integers appear only once.

If we were to add 23 to the string of numbers, the mode would remain identical since "2" still maintains its position as the most commonly appearing number.

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The length of his rectangular field is 35 metres.

Farmer Fred has a rectangle field. 2 / 5 of the field is planted with carrots and the rest is for cabbages.

Therefore, the width of the field is 13 metres. The length of the field can be found as follows:

area of the carrot section = 182 m²

let

x = area of the field.

Therefore,

2 / 5 x  = 182

cross multiply

2x = 910

x = 910 / 2

x = 455 m²

Therefore,

length of the field = 455 / 13

length of the field = 35 metres.

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Answer:

X = 68

x - 24 = 44

and the last angle is given as 68

Step-by-step explanation:

Hope this helps! Pls give brainliest!

As we have proved that L1 = L2 by using the accumulation point.

Let f: D → R be a function, where D is a subset of real numbers and xo is an accumulation point of D. Let L1 and L2 be two limits of f as x approaches xo.

According to the definition of the limit, for any ε > 0, there exists a δ1 > 0 such that if 0 < |x - xo| < δ1, then |f(x) - L1| < ε. Similarly, for any ε > 0, there exists a δ2 > 0 such that if 0 < |x - xo| < δ2, then |f(x) - L2| < ε.

We want to show that L1 = L2. To do this, we will use the epsilon-delta definition of the limit. Let ε > 0 be arbitrary.

Since xo is an accumulation point of D, there exists a sequence {xn} in D{xo} that converges to xo. By definition of convergence, we can say that for any δ > 0, there exists a natural number N such that for all n > N, |xn - xo| < δ.

Now, choose δ = min{δ1, δ2}. Then, there exists a natural number N such that for all n > N, |xn - xo| < δ.

For this value of n, we have:

|f(xn) - L1| < ε (by the definition of the limit L1)

|f(xn) - L2| < ε (by the definition of the limit L2)

Taking the absolute value of the difference between these two inequalities, we get:

|L1 - L2| ≤ |f(xn) - L1| + |f(xn) - L2| < 2ε

Since ε was arbitrary, this means that |L1 - L2| < 2ε for all ε > 0.

Therefore, |L1 - L2| = 0, which implies that L1 = L2.

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The probability is 1, or 100%, that a randomly selected person from this sample believed either the true headline or the false headline.

Probability is a measure of the likelihood or chance that a specific event will occur. It is expressed as a number between 0 and 1, where 0 indicates that an event is impossible and 1 indicates that an event is certain to occur.

The probability that a randomly selected person from this sample believed the true headline or believed the false headline can be calculated by adding the number of people who believed the true headline to the number of people who believed the false headline and dividing by the total sample size.

In this case, the number of people who believed the true headline is 120, and the number of people who believed the false headline is 80. Therefore, the total number of people who believed either headline is 120 + 80 = 200.

The total sample size is also 200, so the probability that a randomly selected person from this sample believed the true headline or believed the false headline is:

(120 + 80) / 200 = 200 / 200 = 1

Therefore, the probability is 1, or 100%, that a randomly selected person from this sample believed either the true headline or the false headline.

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Complete Question:

In a sample of 200 people, 120 believed a true headline and 80 believed a false headline. What is the probability that a randomly selected person from this sample believed the true headline or believed the false headline?

The sample in this study refers to the 1050.

The population of interest is all adult Americans.

The variable of interest in this study is the belief of adult Americans regarding the responsibility of the federal government to ensure healthcare coverage for all Americans.

As it is given in the question that Healthcare for all American A Gallup poll found that 493 of 1050 adult Americans believe it is the responsibility of the federal government. So, the sample in this study refers to the 1050 adult Americans who participated in the Gallup poll.

The population of interest is all adult Americans, which means the Gallup poll results aimed to provide insights into the beliefs of all adult Americans regarding the responsibility of the federal government must secure universal healthcare coverage.

The variable of interest in this study is the belief of adult Americans regarding the responsibility of the federal government to ensure healthcare coverage for all Americans. The variable can be expressed in binary form, where 1 represents those who believe that the federal government has a responsibility to ensure healthcare coverage for all Americans, and 0 represents those who do not believe that the federal government has this responsibility. In the given poll, 493 out of 1050 respondents believed that the federal government has a responsibility to ensure healthcare coverage for all Americans.

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The ending balance in Richard’s checkbook register is $1,009.81

In starting the amount of Richard has in his account is $900.00

All the amount of money which will be credited or deposit in the account that means the money is added in the account .

Al the amount of money that will be debited or payment from the account will be subtracted from the account .

Credited or deposit = $390.36 + $390.36 + $390.36 + $390.36

Debited or payment = $455.00 + $125.40 + $155.44 + $455.00 + $9.20 + $251.59

Total amount of money left = Base money + credited money - debited money

Total amount of money left  = 900 + 1561.44 - 1451.63

Total amount of money left = $1,009.81

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The given question is incomplete the complete question is :

Richard’s checkbook register as of 02/19: Check # Date Description of Transaction Payment/Debit (-) Fee (-) Deposit/Credit (+) Balance 02/03 Deposit $900.00 $900.00 02/05 Deposit - Paycheck $390.36 $1,290.36 201 02/05 Blue Sky Apartments $455.00 $835.36 202 02/07 Renter’s Insurance $125.40 $709.96 203 02/18 Online Clothing Purchase $155.44 $554.52 02/19 Deposit - Paycheck $390.36 $944.88 Enter the following transactions into Richard’s checkbook register and state his ending balance: Date Type Description Amount 03/01 Check #204 Blue Sky Apartments $455.00 03/05 DEP Payroll automatic deposit $390.36 03/08 Debit Benny’s Hamburgers and Fries $9.20 03/15 Check #205 Car payment $251.59 03/19 DEP Payroll automatic deposit $390.36 a. $715.79 b. $1,009.81 c. $780.72 d. $880.24

The margin of error is:

a) 0.069

b) 0.035

c)  0.021

d) 0.032

e) 0.028

What is confidence level?

A confidence interval is a range of estimates for an unknown parameter in frequentist statistics. The 95% confidence level is the most popular, however other levels, such as 90% or 99%, are occasionally used when computing confidence intervals.

Given,

Here at 95% CI, the z value is 1.96

a) sample n = 200, p = 0.52

Now, we find the margin of error and we get

Margin of error = z×√(p(1-p)/n)

Now, substitute values of p, n, and z and we get

= 1.96×√(0.52(1-0.52)/200)

= 0.069

b) n = 800 , p = 0.52

Margin of error = z×√(p(1-p)/n)

Now, we substitute values of n, p, and z and we get

= 1.96×√(0.52(1-0.52)/800)

= 0.035

c) n = 800 , p = 0.1

First,  we find the margin of error and we get

Margin of error = z×√(p(1-p)/n)

Now, we substitute values and we get

= 1.96×√(0.1(1-0.1)/800)

= 0.021

d) n = 800 , p = 0.7

Margin of error = z×√(p(1-p)/n)

Now, we substitute values and we get

= 1.96×√(0.7(1-0.7)/800)

= 0.032

e) n = 1200 , p = 0.60

First, we find the margin of error and we get

Margin of error = z×√(p(1-p)/n)

After substituting values we get

= 1.96×√(0.6(1-0.6)/1200)

= 0.028

Hence,

The margin of error is:

a) 0.069

b) 0.035

c)  0.021

d) 0.032

e) 0.028

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a. The sample space is 5

b. Each simple event in the sample space has a probability of 1/5 or 0.2.

c. The approach used is the classical approach.

In probability theory, a sample space is the set of all possible outcomes of an experiment or a random phenomenon.

It is denoted by the symbol S and is a fundamental concept in probability theory. The sample space includes all the possible outcomes, regardless of whether they are desirable, undesirable, or likely to occur.

Here we have

A quiz contains a multiple-choice question with five possible answers, only one of which is correct.

A student plans to guess the answer because he knows absolutely nothing about the subject.

a. The sample space for the multiple-choice question with five possible answers is S = {A, B, C, D, E} i.e S = 5

Where A, B, C, D, and E denote the possible answers.

b. Since the student plans to guess the answer and knows nothing about the subject, he has an equal chance of selecting any of the five possible answers.

Hence, each simple event in the sample space S has a probability of 1/5 or 0.2.

c. The approach used to assign probabilities to the simple events in the sample space is the classical approach or the principle of equally likely outcomes.

This approach assumes that all outcomes in the sample space are equally likely to occur, and assigns probabilities based on the number of favorable outcomes over the total number of possible outcomes.

d. The probabilities assigned to the simple events in part (b) represent the likelihood of the student guessing the correct answer or any of the incorrect answers.

Since all the events in the sample space are mutually exclusive and collectively exhaustive, the sum of the probabilities of all simple events equals 1, which indicates that the student will always select one of the five possible answers.

Therefore,

a. The sample space is 5

b. Each simple event in the sample space has a probability of 1/5 or 0.2.

c. The approach used is the classical approach.

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