MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Question 24
Humber 81 HOUTS Worked per we B) Reject the null hypothesis; age of car usually driven is associated with number of hours worked per week C) Fail to reject the null hypothesis; age of car usually driven is not associated with number of hours worked per week D) Reject the null hypothesis; age of car usually driven is not associated with number of hours worked per week 24. Use the following information to answer the question. A sprint duathlon consists of a 5 km run, a 20 km bike ride, followed by another 5 km run. The mean finish time of all participants in a recent large duathlon was 1.67 hours with a standard deviation of 0.25 hours. Suppose a random sample of 30 participants in the 40-44 age group was taken and the mean finishing time was found to be 1.62 hours with a standard deviation of 0.40 hours. What is the standard error for the mean finish time of 30 randomly selected participants in the 40-44 age group? Round to the nearest thousandth. A) 0.300 B) 0.250 C) 0.055 D) 0.046 25. Which of the following is not a true statement about the Central Limit Theorem for sample means? A) If conditions are met, the mean of the sampling distribution is equal to the population mean. B) The Central Limit Theorem helps us find probabilities for sample means when those means are based on a random sample from a population. C) If the sample size is large, it doesn't matter what the distribution of the population perform
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Transcribed Image Text:Humber 81 HOUTS Worked per we B) Reject the null hypothesis; age of car usually driven is associated with number of hours worked per week C) Fail to reject the null hypothesis; age of car usually driven is not associated with number of hours worked per week D) Reject the null hypothesis; age of car usually driven is not associated with number of hours worked per week 24. Use the following information to answer the question. A sprint duathlon consists of a 5 km run, a 20 km bike ride, followed by another 5 km run. The mean finish time of all participants in a recent large duathlon was 1.67 hours with a standard deviation of 0.25 hours. Suppose a random sample of 30 participants in the 40-44 age group was taken and the mean finishing time was found to be 1.62 hours with a standard deviation of 0.40 hours. What is the standard error for the mean finish time of 30 randomly selected participants in the 40-44 age group? Round to the nearest thousandth. A) 0.300 B) 0.250 C) 0.055 D) 0.046 25. Which of the following is not a true statement about the Central Limit Theorem for sample means? A) If conditions are met, the mean of the sampling distribution is equal to the population mean. B) The Central Limit Theorem helps us find probabilities for sample means when those means are based on a random sample from a population. C) If the sample size is large, it doesn't matter what the distribution of the population perform
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