The tablet PC manufacturer would need a sample size of at least 4229 respondents to estimate the proportion of people who want to purchase tablet PCs costing more than $700 with a 90% confidence level and a confidence interval width below 0.04.
Estimating a proportion:
Estimating a proportion refers to the process of determining the unknown population proportion based on a sample of data. It is commonly used in statistical inference to make inferences about a population based on sample data.
To find the required sample size to yield a 90% confidence interval with a length below 0.04, we need to determine the appropriate sample size formula for estimating a proportion.
The formula to calculate the required sample size for estimating a proportion is given:
n = (z² × p × q) / (E²)
Where:
n is the required sample size
z is the z-score corresponding to the desired confidence level (representing the desired level of confidence, such as 90% or 95%)
p is the estimated proportion of interest (in this case, the proportion of people who want to purchase tablet PCs costing more than $700)
q is the complement of p (1 - p)
E is the desired margin of error (half the desired confidence interval width)
In this case, we want the confidence interval width to be below 0.04, so the margin of error (E) will be 0.04/2 = 0.02.
Substituting the values into the formula:
n = (1.645² × 0.5 × 0.5) / (0.02²)
n = (2.705025 × 0.25) / 0.0004
n ≈ 1691.265625 / 0.0004
n ≈ 4228.164
Rounding up to the nearest whole number, the required sample size to yield a 90% confidence interval with a length below 0.04 is approximately 4229.
Therefore,
The tablet PC manufacturer would need a sample size of at least 4229 respondents to estimate the proportion of people who want to purchase tablet PCs costing more than $700 with a 90% confidence level and a confidence interval width below 0.04.
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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.
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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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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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 shop owner offered a 20% discount off the regular price of a mirror. The amount of the discount is $3. What is the regular price of the mirror?
Answer:$15
Step-by-step explanation: Okay if the discount is of 3$ and a 20% is 100% if multiplied by 5 then you multiply 3 times 5 there EZ
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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Use the formulas to find the volume of the figure. Show your work.
Answer: 7238.23 ft
Step-by-step explanation:
Formula for volume of a sphere V = (4/3)*(π)*(r^3)
π = 3.141
r = 12
V = (4/3)*(3.141)*(12^3)
V = (4/3)*(3.141)*(1728)
V = 7238.23 ft
Or if you want you answer in terms of π:
V = (4/3)*(1728)*(π)
V = 2304π ft
30 points!!
question is in picture
pls
[tex]\cos A=\dfrac{AB}{26}\\\\(AB)^2+10^2=26^2\\(AB)^2+100=676\\(AB)^2=576\\AB=24\\\\\cos A=\dfrac{24}{26}=\dfrac{12}{13}[/tex]
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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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.
if the first and last terms of an arithmetic series are 5 and 27, respectively, and the series has a sum 192, then the number of terms in the series is
If the first and last terms of an arithmetic series are 5 and 27, respectively, and the sum of the series is 192, then the number of terms in the series can be calculated as 12.
To find the number of terms in the arithmetic series, we can use the formula for the sum of an arithmetic series:
Sum = (n/2)(first term + last term)
We are given the first term (5), the last term (27), and the sum (192). Plugging these values into the formula, we have:
192 = (n/2)(5 + 27)
Simplifying the equation:
192 = (n/2)(32)
192 = 16n
Dividing both sides of the equation by 16:
n = 192/16
n = 12
Therefore, the number of terms in the arithmetic series is 12.
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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.
7. A car lot owner pays his salespeople
a commission of 10% on total sales.
The owner wants to make a profit of
1 Lakh on each car. The cost price of a
car is Nu 90,000. What must the selling
price of the car be for the owner to
make a profit and pay commission?
Answer: 2,11,111
Step-by-step explanation:
The cost price is: 90000
The profit needed is 100000
Profit + commission = Selling price - cost price
Selling Price - 90,000 = 1,00,000 + 10%Selling Price
SP - 90,000 = 1,00,000 + 0.1 * SP
0.9 * SP = 1,00,000 + 90,000
0.9 * SP = 1,90,000
Selling Price = 1,90,000 / 0.9
SP= 2,11,111.11
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
farmers Market has 472 crates of apples. Each crate holds 28 bags of apples with 6 apples in each bag How many apples are there?
Answer:
79,296
Step-by-step explanation:
472x28x6=79,296
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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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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A woodcarver draws cut lines on the top of a wooden disc. She uses the drawing of her design, as shown. In chords BFand CE are perpendicular to diameter AD. Which of the following relationships is true?
A AG = OH
B CH = HE
C FG = HD
~ BG = HE
The option that shows the relationship that is true is B CH = HE.
How to explain the informationIn tho case, Chord BF is perpendicular to diameter AD, so it bisects the diameter and creates two congruent semicircles.
Chord CE is also perpendicular to diameter AD, so it bisects the diameter and creates two congruent semicircles.
Chord BF is perpendicular to diameter AD, so it bisects the diameter and creates two congruent semicircles.
Chord CE is also perpendicular to diameter AD, so it bisects the diameter and creates two congruent semicircles. In this case, CH is equal to HE as they have same length.
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Suppose that f(x) = x/8 for 3 < x < 5. Determine the following probabilities: a. P(X < 4) b. P(X > 3.5) c. P(4 < X < 5) d. P(X < 4.5) e. P(X < 3.5 or X > 4.5)
The value of the probabilities are
a. P(X < 4) = 0
b. P(X > 3.5) ≈ 0.796875
c. P(4 < X < 5) ≈ 0.5625
d. P(X < 4.5) ≈ 0.703125
e. P(X < 3.5 or X > 4.5) = 0
a. P(X < 4):
To calculate P(X < 4), we need to find the area under the curve of the function f(x) = x/8 for values of x less than 4. However, the given function is only defined for the range 3 < x < 5. Therefore, we cannot directly calculate P(X < 4) using this function. The probability of X being less than 4 is zero since the function does not cover that range.
b. P(X > 3.5):
To calculate P(X > 3.5), we need to find the area under the curve of the function f(x) = x/8 for values of x greater than 3.5. Since the function is defined for 3 < x < 5, we can calculate this probability by integrating the function over the range 3.5 to 5.
Integrating f(x) from 3.5 to 5:
∫[3.5, 5] (x/8) dx = [x²/16] evaluated from 3.5 to 5
= [(5²/16) - (3.5²/16)]
= (25/16) - (12.25/16)
= 12.75/16
= 0.796875
Therefore, P(X > 3.5) ≈ 0.796875.
c. P(4 < X < 5):
To calculate P(4 < X < 5), we need to find the area under the curve of the function f(x) = x/8 for values of x between 4 and 5. We can calculate this probability by integrating the function over the range 4 to 5.
Integrating f(x) from 4 to 5:
∫[4, 5] (x/8) dx = [x²/16] evaluated from 4 to 5
= [(5²/16) - (4²/16)]
= (25/16) - (16/16)
= 9/16
= 0.5625
Therefore, P(4 < X < 5) ≈ 0.5625.
d. P(X < 4.5):
To calculate P(X < 4.5), we need to find the area under the curve of the function f(x) = x/8 for values of x less than 4.5. We can calculate this probability by integrating the function over the range 3 to 4.5.
Integrating f(x) from 3 to 4.5:
∫[3, 4.5] (x/8) dx = [x²/16] evaluated from 3 to 4.5
= [(4.5²/16) - (3²/16)]
= (20.25/16) - (9/16)
= 11.25/16
= 0.703125
Therefore, P(X < 4.5) ≈ 0.703125.
e. P(X < 3.5 or X > 4.5):
To calculate P(X < 3.5 or X > 4.5), we can calculate the sum of probabilities P(X < 3.5) and P(X > 4.5). However, as mentioned earlier, the function f(x) = x/8 is not defined for values less than 3 or greater than 5. Therefore, the probability of X being less than 3.5 or greater than 4.5 is zero.
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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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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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You move up 4 units. You end at (-3, -1). Where did you start?
Answer: (-3,-5)
Step-by-step explanation: -1-4=-5
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)
Which is a solution of the following equation?
2 − 3 = −12
a. (0, −4) b. (6, 0). (3, 6) d. (−3, −2)
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" .
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
For what value of n does
(1/36)n =216?
Answer:
The second option is the correct answer.
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
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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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.
