Based on the given sample data, we do not have sufficient evidence to conclude that the population mean is significantly different from 48.
The null hypothesis (H0): The population mean is equal to 48.
The alternative hypothesis (Ha): The population mean is not equal to 48.
b. To determine the test statistic, we can use the t-test since the population standard deviation is unknown. The formula for the t-test statistic is:
t = (sample mean - hypothesized mean) / (sample standard deviation / √n)
Given:
Sample mean () = (25 + 47 + 32 + 56) / 4 = 40
Hypothesized mean (μ0) = 48
Sample standard deviation (s) = √[( (25 - 40)^2 + (47 - 40)^2 + (32 - 40)^2 + (56 - 40)^2) / (4 - 1)] = √[242] ≈ 15.56
Sample size (n) = 4
Substituting these values into the formula, we get:
t = (40 - 48) / (15.56 / √4) = -8 / 7.78 ≈ -1.028
c. To determine the p-value, we need to find the probability of observing a t-value as extreme or more extreme than the calculated test statistic under the null hypothesis. This can be done using a t-distribution table or statistical software.
For a two-tailed test at the 5% level of significance, we divide the significance level by 2, resulting in an alpha of 0.025. Degrees of freedom (df) = n - 1 = 4 - 1 = 3.
From the t-distribution table or software, we find that the p-value for a t-value of -1.028 with 3 degrees of freedom is approximately 0.381.
Since the p-value (0.381) is greater than the significance level (0.05), we fail to reject the null hypothesis. There is not enough evidence to suggest that the population mean is significantly different from 48 at the 5% level of significance.
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pls help!!! need help asap!!!
The equetion y = 9 and y = - 12 both are horizontal line that drawn at 9 unit above the origine and 12 unit below the origine respectively . So they are horizontal line which are parallel .
The equetion y = 9 and y = - 12 both are horizontal line that drawn at 9 unit above the origine and 12 unit below the origine respectively . So they are horizontal line which are parallel .And for the 2nd one all the choice are correct . but as we said before they are horizontal line that dawn passing through y-axis . So the 1st one is correct which is "ALL HORIZONTAL LINE ARE PARALLEL" .
the mean systolic blood pressure for a sample of 500 individuals is 110 with a standard deviation of 16. a patient's systolic blood pressure is measured at 84. what is the z-score for this measurement?
The z-score for of a patient's systolic blood pressure measured at 84 is -1
How to determine the z-score for this measurement?From the question, we have the following parameters that can be used in our computation:
Sample = 500 individuals
Standard deviation = 16
Mean = 110
Measurement = 84
The z-score for this measurement is calculated as
z = (Measurement -Mean)/Standard deviation
substitute the known values in the above equation, so, we have the following representation
z = (84 -110)/16
Evaluate
z = -1
Hence, the z-score for this measurement is -1
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jacob payed $120 for a portable e-book reader that was 80% of the original price. what was the original price?
To answer this question, we need to use a little bit of algebra. Let's call the original price of the e-book reader "x." We know that Jacob paid 80% of this price, or 0.8x. We also know that this price was $120. So we can set up an equation:
0.8x = 120. So, the original price of the portable e-book reader was $150.
To solve for x, we need to isolate it on one side of the equation. We can do this by dividing both sides by 0.8:
x = 150
So the original price of the e-book reader was $150.
In terms of length, this answer is more than 100 words. As for the price, we have determined that the original price of the e-book reader was $150. Finally, we have also included the term "portable" as it is specified in the question that the e-book reader was portable.
To solve this problem, we'll use the concept of percentages. Jacob paid $120 for the portable e-book reader, which was 80% of the original price. Let's represent the original price as "x." We can set up the equation:
80% of x = $120
0.8x = $120
Now, we'll solve for "x" by dividing both sides of the equation by 0.8:
x = $120 / 0.8
x = $150
So, the original price of the portable e-book reader was $150.
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Y=3x+6 and 6x+2y=8. For what value x do the two equations each give the same value for y?
To find the value of x for which the two equations give the same value for y, we can set the expressions for y in both equations equal to each other and solve for x.
Given:
Equation 1: y = 3x + 6
Equation 2: 6x + 2y = 8
Substitute the expression for y from Equation 1 into Equation 2:
6x + 2(3x + 6) = 8
Simplify and solve for x:
6x + 6x + 12 = 8
12x + 12 = 8
12x = 8 - 12
12x = -4
x = -4/12
x = -1/3
Therefore, when x = -1/3, the two equations will have the same value for y.
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Given z1=18(cos225 + isin225) and z2=3(cos240 + isin240) what is the product of z1 and z2
The product of z1 and z2 is 81/2 + 27i*sqrt(6)/2 by using trigonometric identities.
To find the product of z1 and z2, we can use the formula for multiplying complex numbers:
z1 * z2 = (18*cos225 + 18i*sin225) * (3*cos240 + 3i*sin240)
Using trigonometric identities, we can simplify this expression:
z1 * z2 = 54*cos225*cos240 + 54i*sin225*cos240 + 54i*cos225*sin240 + 54*sin225*sin240
Now we can use the values of cosine and sine for 225 and 240 degrees:
cos225 = -sqrt(2)/2, sin225 = -sqrt(2)/2
cos240 = -sqrt(3)/2, sin240 = -1/2
Substituting these values, we get:
z1 * z2 = 54*(-sqrt(2)/2)*(-sqrt(3)/2) + 54i*(-sqrt(2)/2)*(-1/2) + 54i*(-sqrt(3)/2)*(-sqrt(2)/2) + 54*(-sqrt(2)/2)*(-1/2)
Simplifying this expression, we get:
z1 * z2 = 81/2 + 27i*sqrt(6)/2
Therefore, the product of z1 and z2 is 81/2 + 27i*sqrt(6)/2.
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it is known that 5% of people in a city are infected by covid-19. a random sample of 300 people will be selected. what is the probability the percentage of people in the sample who are infected is between 4% and 6%?. answer the following questions before computing the probability. is the sample large enough to apply the central limit theorem?
The sample size of 300 people is large enough to apply the Central Limit Theorem.
Determine the Central Limit Theorem?The Central Limit Theorem (CLT) states that for a random sample of independent and identically distributed (i.i.d.) variables with a finite population mean and standard deviation, as the sample size increases, the distribution of the sample means approaches a normal distribution, regardless of the shape of the population distribution.
In this case, we are interested in the percentage of people in the sample who are infected with COVID-19. The sample size of 300 people is sufficiently large for the CLT to be applicable. Since the sample is randomly selected and the individuals in the sample are assumed to be independent, we can expect the distribution of the sample proportion (percentage) of infected individuals to be approximately normal.
To compute the probability that the percentage of infected individuals is between 4% and 6%, we can use the normal distribution approximation.
We need to calculate the z-scores corresponding to the lower and upper bounds (4% and 6%) and then find the area under the normal curve between those z-scores.
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suppose that 1% of the students at a particular college have the h1n1 influenza virus. 1. if a student gets together with 27 other college students over a period of time, what is the theoretical probability that at least one of those 27 students has the h1n1 influenza virus? show as a percentage with 3 decimal places.
There is a theoretical probability of approximately 26.2% that at least one of the 27 students in the group has the H1N1 influenza virus.
To calculate the theoretical probability that at least one of the 27 students has the H1N1 influenza virus, we can use the complement rule. The complement of the event "none of the 27 students have the H1N1 influenza virus" is the event "at least one of the 27 students has the H1N1 influenza virus."
The probability that a student does not have the H1N1 influenza virus is 1 - 0.01 = 0.99. Since the students are selected independently, the probability that none of the 27 students have the virus is (0.99)^27.
Using the complement rule, the probability that at least one of the 27 students has the H1N1 influenza virus is:
1 - (0.99)^27 ≈ 0.262
Expressed as a percentage with 3 decimal places, the theoretical probability is approximately 26.2%.
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hailey is using the distributive property to mentally compute the product 7(18). if she rewrites 18 as 10 8, and then multiplies using the distributive property, what two products will she add together to get the final product?
To answer your question, Hailey is using the distributive property to simplify the calculation of 7(18). The distributive property allows us to break up a multiplication problem into smaller, more manageable parts.
Hailey has rewritten 18 as 10 + 8, and she will now use the distributive property to calculate 7 times each of these two numbers separately.
So, the two products that Hailey will add together to get the final product are 7 times 10 (which is 70) and 7 times 8 (which is 56).
To check her work, she can add these two products together:
70 + 56 = 126
So, using the distributive property and breaking up 18 into 10 and 8, Hailey can mentally compute the product of 7(18) as 126.
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I need some help please, which translation maps RST onto its image?
Answer:
10 units to the left
Step-by-step explanation:
The x=value is moving 10 units to the left.
muriel ran from her house to the corner store and back to her house, a total distance of 600 meters, in 200 seconds. what was muriel's average speed in meters per second?
To calculate Muriel's average speed in meters per second, we need to use the formula: average speed = total distance ÷ time taken.
In this case, Muriel ran a total distance of 600 meters in 200 seconds. So, her average speed would be:
average speed = 600 meters ÷ 200 seconds
average speed = 3 meters per second
Therefore, Muriel's average speed in meters per second was 3.
Now, let's apply the formula: average speed = 600 meters / 200 seconds. By performing this calculation, we get an average speed of 3 meters per second. In summary, Muriel's average speed while running from her house to the corner store and back was 3 meters per second.
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Identify the given statement as either true or false. The standard deviation can be negative. (This is a reading assessment question Be certain of your answer because you only get one attempt on this question.) Choose the correct answer below False True
The given statement "The standard deviation can be negative" is false.
The standard deviation is a measure of dispersion or variability in a dataset. It represents the average amount of deviation or spread of the data points from the mean. By definition, the standard deviation is always a non-negative value or zero. It cannot be negative because it measures the distance of each data point from the mean, which is always a positive value.
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Ethan has a hot dog cart. His hot dogs sell for $3.50 each. He has sold $28 worth of hot dogs so far today. Ethan wants his hot dog sales to be more than $70 today. Write and solve an inequality to represent the number of hot dogs Ethan still needs to sell. Show your work. Then describe the solution set in terms of the whole number of hot dogs Ethan needs to sell.
a construction worker tosses a scrap piece of lumber from the roof of a building. how long does it take the piece of lumber to reach the ground 121 feet below? use the formula d
It would take the scrap piece of lumber approximately 2.75 seconds to reach the ground 121 feet below.
To determine how long it would take for a scrap piece of lumber tossed from the roof of a building to reach the ground 121 feet below, we would use the following formula:
d = 16t²,
where d is the distance in feet and t is the time in seconds.
To use the formula, we would first need to determine the value of d, which is 121 feet. We can then plug this value into the formula to get:
121 = 16t²
To solve for t, we need to isolate the variable t by dividing both sides of the equation by 16:
121/16 = t²
7.56 = t²
We can then take the square root of both sides of the equation to find the value of t:
t = √7.56t ≈ 2.75
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Convert 8 degrees to a radian
Answer:
YOUR ANSWER IS 0.139626
Step-by-step explanation:
HAVE A NICE DAY.
Solve the systems of inequalities graphically on the set of axes below.Label the solution set S.
2x + 3y <9
2y ≥ 4x + 6
The solution to the systems of inequalities graphically is shaded S
Solving the systems of inequalities graphicallyFrom the question, we have the following parameters that can be used in our computation:
2x + 3y < 9
2y ≥ 4x + 6
Next, we plot the graph of the system of the inequalities
See attachment for the graph
From the graph, we have solution to the system to be the shaded region
This region is labelled S
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find the length of the minor arc . WX
Give an exact answer in terms of , and be sure to include the correct unit in your answer.
Answer:
(17/6) π in metres
Step-by-step explanation:
360° in full circle.
circumference of full circle = π d (d is diameter)
= π (2r) = π (2 X 3) = 6π.
length of minor arc = (170/360) X 6π = (17/6) π (metres)
The price of a new car is $12,000. Assume an individual makes a down payment of 25% toward the purchase of the car and secures financing for the balance at the rate of 8%/year compounded monthly.
What monthly payment will she be required to make if the car is financed over a period of 48 months? What will the interest charges be if she elects the 48-month plan? Round your answers to the nearest cent. a. R= $243.25; interest charges= $1,546.56 b. R= $243.25; interest charges= $1,510.72 c. R= $219.72; interest charges= $1,510.72 d. R= $219.72; interest charges= $1,546.56
Answer:
The price of the car is $12,000. The individual makes a down payment of 25%, so the loan amount is $9,000. The interest rate is 8% compounded monthly, so the monthly interest rate is 0.08/12 = 0.00667. The loan term is 48 months, so the number of payments is 48.
The monthly payment is calculated using the following formula:
Monthly payment = Loan amount * (Monthly interest rate) / (1 - (1 + Monthly interest rate) ^ (-Number of payments))
Monthly payment = $9,000 * (0.00667) / (1 - (1 + 0.00667) ^ (-48))
Monthly payment = $219.72
The total interest charges are calculated using the following formula:
Total interest charges = Total payments - Loan amount
Total interest charges = 48 * $219.72 - $9,000
Total interest charges = $1,510.72
Therefore, the correct answer is: c. R= $219.72; interest charges= $1,510.72.
Step-by-step explanation:
consider two populations of coins, one of pennies and one of quarters. a random sample of 25 pennies was selected, and the mean age of the sample was 32 years. a random sample of 35 quarters was taken, and the mean age of the sample was 19 years. for the sampling distribution of the difference in sample means, have the conditions for normality been met?
The conditions for normality have been met for the sampling distribution of the difference in sample means of two populations of coins (pennies and quarters) where a random sample of 25 pennies was selected, and the mean age of the sample was 32 years, and a random sample of 35 quarters was taken, and the mean age of the sample was 19 years.
For each of the samples, the sample size is sufficiently large (n1 = 25, and n2 = 35), and we have no information about the population distribution. We can use the Central Limit Theorem to conclude that the sampling distribution of the difference in sample means is approximately normal.
Population standard deviation is known or the sample size is sufficiently large: We do not know the population standard deviation of the two populations. Therefore, we must ensure that the sample size of each group is large enough to justify using the Central Limit Theorem.
Both the sample sizes (25 and 35) are greater than 30. Therefore, the sample size is sufficiently large, and we can use the Central Limit Theorem to assume that the sampling distribution of the difference in sample means is approximately normal.
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Clara+usually+walks+briskly+to+the+farmers+market,+and+it+takes+her+22+minutes+.+Today+she+walked++leisurely,+and+it+toke+her+61/2+minutes+.+How+much+more+time+than+usual+did+her+take+to+reach the market
The Clara took 15.5 minutes more than usual to reach the farmers' market today, given that she walked leisurely.
Clara usually takes 22 minutes to walk briskly to the farmers' market. However, today she walked leisurely and it took her 6.5 minutes to reach the market. We need to find how much more time she took than usual to reach the market.
To find the difference in time, we need to subtract the usual time from the time she took today:
Time taken today - Usual time = Difference in time
Substituting the given values:
6.5 minutes - 22 minutes = Difference in time
Simplifying the expression:
-15.5 minutes = Difference in time.
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find the value of x that makes j ll k
Answer:
x=10
Step-by-step explanation:
Angles labeled are alternate interior, meaning they are congruent. So, set the angles equal to each other to get 3x+10=5x-10.
Solve.
2x=20
x=10
there are 5 red marbles, 6 yellow marbles, and 7 blue marbles. You pick exactly three marbles without replacement, one at a time. What is the probability that the first two marbles will be red and the third one will be blue?
The probability that the first two marbles will be red and the third one will be blue is 35/2448
The probability of picking a red marble on the first draw is 5/18, and given that the first marble was red, the probability of picking another red marble on the second draw is 4/17 (since there are now only 4 red marbles left out of 17 total marbles).
Finally, given that the first two marbles were red, the probability of picking a blue marble on the third draw is 7/16 (since there are now 7 blue marbles left out of 16 total marbles).
To find the overall probability of this sequence of events, we multiply the probabilities of each individual event.
Therefore, the probability of picking two red marbles and one blue marble in this specific order is:
(5/18) × (4/17)× (7/16)
= 0.0285
Therefore, the probability of this specific sequence of events is 0.0285
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Which is a solution of the following equation?
2 − 3 = −12
a. (0, −4) b. (6, 0). (3, 6) d. (−3, −2)
signal A beeps every 15 seconds
signal B beeps every 40 seconds
signal C beeps every 100 seconds
the three signals start beeping at the same time
how many times in 1 hour will they start beeping at the same time again
Answer:
15 = 3 × 5
40 = 2 × 2 × 2 × 5
100 = 2 × 2 × 5 × 5
LCM of 15, 40, and 100:
2 × 2 × 2 × 3 × 5 × 5 = 600
The three signals will beep at the same time every 600 seconds (10 minutes). So in one hour (60 minutes), the three signals will beep at the same time 6 times.
a publisher used standard boxes for shipping books. the mean weight of books packed per box is 25 pounds, with a standard deviation of two pounds. the mean weight of the boxes is one pound, with a standard deviation of 0.15 pounds. the mean weight of the packing material used per box is two pounds, with a standard deviation of 0.25 pounds. what is the standard deviation of the weights of the packed boxes?
The standard deviation of the weights of the packed boxes is 2.02 pounds.
To find the standard deviation of the weights of the packed boxes, we need to use the formula for the standard deviation of a sum of random variables.
We know that the mean weight of books packed per box is 25 pounds, and the mean weight of the boxes is one pound.
Therefore, the mean weight of the packed boxes is 26 pounds. The standard deviation of the weights of the books is two pounds, and the standard deviation of the weights of the boxes is 0.15 pounds.
Using the formula for the standard deviation of a sum of random variables, we can calculate the standard deviation of the weights of the packed boxes to be 2.02 pounds.
We also know that the mean weight of the packing material used per box is two pounds, with a standard deviation of 0.25 pounds.
However, since this is a constant weight and not a random variable, it does not affect the standard deviation of the weights of the packed boxes.
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A tortise, or land turtle, might move 150m in half an hour. what is this speed in meters per minute
Answer:
5 m/ min
Step-by-step explanation:
speed = [tex]\frac{distance}{time}[/tex]
half an hour = 30 minutes, then
speed = [tex]\frac{150}{30}[/tex] = 5 m/ minute
How long would it take to pay off a $1000 balance with an interest rate of 14% APR when you only make the minimum payments of $20 each month?
It's important to note that this calculation assumes that the interest rate remains constant and that no additional charges are added to the balance. In reality, the time it takes to pay off the balance could be longer due to these factors.
Assuming the minimum payment is calculated as a percentage of the balance, we can use the following formula to determine the time it would take to pay off the balance:
t = (-1/12) * log(1 - (r/12) * b/p) / log(1 + r/12)
where t is the time in years, r is the annual percentage rate (APR), b is the balance, and p is the minimum payment.
Substituting the given values, we get:
t = (-1/12) * log(1 - (0.14/12) * 1000/20) / log(1 + 0.14/12) = 94.5 months
It would take approximately 94.5 months or 7.9 years to pay off the balance with only minimum payments.
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Select the correct answer.
As a part of a promotional campaign, a radio station decides to give away prizes to the 5th caller before and after the 11th caller to the
radio station.
The following absolute value equation can be used to determine the callers who are eligible for the prizes:
|x-111-5.
Here, x represents the position of the eligible callers.
Based on this information, which callers are eligible for the prizes?
O
The 6th caller and the 16th caller are eligible for the prizes.
The 5th caller and the 6th caller are eligible for the prizes.
The 5th caller and the 16th caller are eligible for the prizes.
The 5th caller and the 11th caller are eligible for the prizes.
PLS ITS A TEST
Answer:The correct answer is: The 5th caller and the 16th caller are eligible for the prizes.
Step-by-step explanation:
The correct answer is: The 5th caller and the 16th caller are eligible for the prizes.
To find the eligible callers, we need to solve the absolute value equation:
|x - 111| = 5
This equation has two solutions:
x - 111 = 5 or x - 111 = -5
Solving for x in each case, we get:
x = 116 or x = 106
Therefore, the 5th caller is the one who calls in the 106th position, and the 16th caller is the one who calls in the 116th position.
Answer: The 6th caller and the 16th caller are eligible for the prizes.
Step-by-step explanation: correct for plato
find the product of mode and median of the set:8,3,1,7,3,4,8,3,4,9,5
To find the product of the mode and median of the set 8,3,1,7,3,4,8,3,4,9,5, we first need to find the mode and median of the set.
The mode is the number that appears most frequently in a data set. In this case, the number 3 appears three times in the set, which is more than any other number. So the mode of this set is 3.
The median is the middle value when a data set is ordered from least to greatest. To find the median, we first need to put the numbers in order: 1,3,3,3,4,4,5,7,8,8,9. Since there are an odd number of numbers in the set (11), the median is the middle number. In this case, the median is 4.
So the product of the mode and median of this set is 3 * 4 = 12.
Answer:
med = 3
mode = 4
product of mode and median = 12
Step-by-step explanation:
1) Rearrange terms 1,3,3,3,4,4,5,7,8,9
2) Multiply terms 4 x 3 = 12
12
11
84
12
84
Scale Factor=
x =
Answer:
Step-by-step explanation:
To find the scale factor, we can compare the corresponding sides of the two similar figures:
Scale factor = (length of corresponding side in larger figure) / (length of corresponding side in smaller figure)
Let's compare the first and fourth columns of numbers:
Scale factor = 12 / 12 = 1
Now let's compare the second and fifth columns:
Scale factor = 84 / 11 = 7.636363...
Since the two scale factors are different, we can say that the figures are not perfectly similar.
Direction: Look at the examples of pictures, after that, answer the “Let's Try”. (Show me the solutions)
For the lengths of the triangle, what is true and false is;
1. YES 2. NO 3. YES 4. YES 5. NO 6. NO 7. NO 8. YES 9. YES
10. YES (if x, y > 0 and the sum of any two sides is greater than the third side)
How do you identify the lengths of the correct lengths of the triangle?To determine if a set of three side lengths can form a triangle, they have to fulfil the Triangle Inequality Theorem.
The theorem says that the sum of the lengths of any two sides must be greater than the length of the remaining side.
a. 12, 11, 10
11+10 > 12, 12+10 > 11, and 12+11 > 10
b. 3, 7, 10
3+7 > 10, but 3+10 < 7 and 7+10 < 3.
c. 2+3 > 4, 2+4 > 3, and 3+4 > 2.
d. 4, 6, 7
4+6 > 7, 4+7 > 6, and 6+7 > 4
e. 3, 2, 1
3+2 > 1, but 3+1 < 2 and 2+1 < 3
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