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Let's go to the movies: A random sample of 42 Foreign Language movies made since 2000...
Let's go to the movies: A random sample of 44 Foreign Language movies made since 2000...
Let's go to the movies: A random sample of 44 Foreign Language movies made since 2000 had a mean length of 110.8 minutes, with a standard deviation of 14.5 minutes. Part: 0/2 Part 1 of 2 Construct a 98% confidence interval for the true mean length of all Foreign Language movies made since 2000. Round the answers to one decimal place. A 98% confidence interval for the true mean length of all Foreign Language movies made since 2000 is <<...
Let’s go to the movies: A random sample of 35 Hollywood movies made in the last...
Let’s go to the movies: A random sample of 35 Hollywood movies made in the last 10 years had a mean length of 125.2 minutes, with a standard deviation of 20.4 minutes. a. Construct a 95% confidence interval for the true mean length of all Hollywood movies made in the last 10 years. b. As of January 2017 there have been five movies released in the Bourne film series, and their mean length is 119.8 minutes. Someone claims that the...
3) A random sample of 35 Hollywood movies made since the years 2010 had a mean...
3) A random sample of 35 Hollywood movies made since the years 2010 had a mean length of 121.6 minutes, with a standard deviation of 20.4 minutes. a) Construct a 98% confidence interval for the true mean length of all Hollywood movies made since 2010. Interpret your answer. b) As of June 2013, three Ironman movies have been released, and their mean length is 127 minutes. Someone claims that the mean length of Ironman movies is less than the mean...
A random sample of 13 students were asked how long it took them to complete a...
A random sample of 13 students were asked how long it took them to complete a certain exam. The mean length of time was 105.5 minutes, with a standard deviation of 66.7 minutes. Find the lower bound of the 90% confidence interval for the true mean length of time it would take for all students to complete the exam. Round to one decimal place (for example: 108.1). Write only a number as your answer. Do not write any units.
3 Construct a 90% confidence interval for the following random sample of Lucas Barrett's golf scores...
3 Construct a 90% confidence interval for the following random sample of Lucas Barrett's golf scores for a particular golf course he played so that he can figure out his true (population) aver 95 92 95 99 92 84 95 94 95 86 (hint: Use T-distribution table. Formula Interval estimate of a population mean when stan age score for the dared deviation is unknown) 4 The auto industry relies heavily on 0% financing to entice customers to purchase cars. In...
1. For each of the following, select the best answer and circle it. a) What is...
1. For each of the following, select the best answer and circle it. a) What is a for a 60% confidence level? 40 20 0.4 L 0.2 0.04 0.02 b) Find the critical t-values corresponding to a 60% confidence level, with n = 27. +0.856 +2.162 2.158 +1.315 0.855 +1.314 c) What are the critical t-values for a confidence interval if a = 0.10 and n = 35? +1.307 1.691 2.728 +1.690 +2.724 +1.306 d) What confidence level would use...
10 A publisher wants to estimate the mean length of time (in minutes) all adults spend...
10
A publisher wants to estimate the mean length of time (in minutes) all adults spend reading newspapers. To determine this estimate the publisher takes a random sample of 15 people and obtains the results below. From past studies, the publisher assumes o is 23 minutes and that the population of times is normally distributed 12 9 10 7 9 8 7 12 12 6 11 9 9 Construct the 90% and 99% confidence intervals for the population mean. Which...
9. A simple random sample of 37 weights of pennies made after 1983 has a sample...
9. A simple random sample of 37 weights of pennies made after 1983 has a sample mean of 2.4991 g and a known population standard deviation of 0.0165 g. a. Construct a 99% confidence interval estimate of the mean weight of all such pennies. b. Design specifications require a population mean of 2.5 g. What does the confidence interval suggest about the manufacturing process? 10. A random sample of 40 students has a mean annual earnings of $3120 and a...
hi there, having trouble with stats homework In a random sample of 22 people, the mean...
hi there, having trouble with stats homework
In a random sample of 22 people, the mean commute time to work was 31.5 minutes and the standard deviation was 7.3 minutes. Assume the population is normally distributed and use a t-distribution to construct a 80% confidence interval fo the population mean u. What is the margin of error of u? Interpret the results. The confidence interval for the population mean u is ( 29.4, 33.6) (Round to one decimal place as...
6.2.17-T Question Help In a random sample of 21 people, the mean commute time to work...
6.2.17-T Question Help In a random sample of 21 people, the mean commute time to work was 34.9 minutes and the standard deviation was 7.3 minutes Assume the population is normaly distrbuted and use a t-distribution to construct a 80% confidence interval for the population mean μ what is the margin of error of μ? Interpret the results The confidence interval for the population mean μ is (Round to one decimal place as needed.) Enter your answer in the edit...
Let's go to the movies: A random sample of 44 Foreign Language movies made since 2000 had a mean length of 110.8 minutes, with a standard deviation of 14.5 minutes. Part: 0/2 Part 1 of 2 Construct a 98% confidence interval for the true mean length of all Foreign Language movies made since 2000. Round the answers to one decimal place. A 98% confidence interval for the true mean length of all Foreign Language movies made since 2000 is <<...
3) A random sample of 35 Hollywood movies made since the years 2010 had a mean length of 121.6 minutes, with a standard deviation of 20.4 minutes. a) Construct a 98% confidence interval for the true mean length of all Hollywood movies made since 2010. Interpret your answer. b) As of June 2013, three Ironman movies have been released, and their mean length is 127 minutes. Someone claims that the mean length of Ironman movies is less than the mean...
3 Construct a 90% confidence interval for the following random sample of Lucas Barrett's golf scores for a particular golf course he played so that he can figure out his true (population) aver 95 92 95 99 92 84 95 94 95 86 (hint: Use T-distribution table. Formula Interval estimate of a population mean when stan age score for the dared deviation is unknown) 4 The auto industry relies heavily on 0% financing to entice customers to purchase cars. In...
1. For each of the following, select the best answer and circle it. a) What is a for a 60% confidence level? 40 20 0.4 L 0.2 0.04 0.02 b) Find the critical t-values corresponding to a 60% confidence level, with n = 27. +0.856 +2.162 2.158 +1.315 0.855 +1.314 c) What are the critical t-values for a confidence interval if a = 0.10 and n = 35? +1.307 1.691 2.728 +1.690 +2.724 +1.306 d) What confidence level would use...
10
A publisher wants to estimate the mean length of time (in minutes) all adults spend reading newspapers. To determine this estimate the publisher takes a random sample of 15 people and obtains the results below. From past studies, the publisher assumes o is 23 minutes and that the population of times is normally distributed 12 9 10 7 9 8 7 12 12 6 11 9 9 Construct the 90% and 99% confidence intervals for the population mean. Which...
hi there, having trouble with stats homework
In a random sample of 22 people, the mean commute time to work was 31.5 minutes and the standard deviation was 7.3 minutes. Assume the population is normally distributed and use a t-distribution to construct a 80% confidence interval fo the population mean u. What is the margin of error of u? Interpret the results. The confidence interval for the population mean u is ( 29.4, 33.6) (Round to one decimal place as...
6.2.17-T Question Help In a random sample of 21 people, the mean commute time to work was 34.9 minutes and the standard deviation was 7.3 minutes Assume the population is normaly distrbuted and use a t-distribution to construct a 80% confidence interval for the population mean μ what is the margin of error of μ? Interpret the results The confidence interval for the population mean μ is (Round to one decimal place as needed.) Enter your answer in the edit...
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