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c. Calculate the value of the test statistic. z= (Round to two decimal places as needed.)

c. Calculate the value of the test statistic. z= (Round to two decimal places as needed.)

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Researchers investigated the physiological changes that accompany laughter. Ninety subjects (18-34 years old) watched film clips designed to evoke laughter. During the laughing period, the researchers measured the heart rate (beats per minute) of each subject, with the following summary results: x= 73.8, s = 8. It is well known that the mean resting heart rate of adults is 71 beats per minute. Complete parts a through d below. %3D ... a. Set up Ho and H, for testing whether the true mean heart rate during laughter exceeds 71 beats per minute. Choose the correct answer below. A. Ho: µ#71 Ha: µ=71 B. Ho: μ= 71 Ha: µ>71 D. Ho: μ= 71 O C. Ho: H=71 Ha: u#71 Ha:H<71 b. If a = 0.10, find the rejection region for the test. Choose the correct answer below. O A. z> 1.28 or z< - 1.28 B. z< - 1.645 O C. z> 1.645 D. z> 1.645 or z< - 1.645 E. z>1.28 O F. z< - 1.28 c. Calculate the value of the test statistic. (Round to two decimal places as needed.) (1,1) More View an example Textbook Statcrunch Clear all Check answer
Transcribed Image Text:Researchers investigated the physiological changes that accompany laughter. Ninety subjects (18-34 years old) watched film clips designed to evoke laughter. During the laughing period, the researchers measured the heart rate (beats per minute) of each subject, with the following summary results: x= 73.8, s = 8. It is well known that the mean resting heart rate of adults is 71 beats per minute. Complete parts a through d below. %3D ... a. Set up Ho and H, for testing whether the true mean heart rate during laughter exceeds 71 beats per minute. Choose the correct answer below. A. Ho: µ#71 Ha: µ=71 B. Ho: μ= 71 Ha: µ>71 D. Ho: μ= 71 O C. Ho: H=71 Ha: u#71 Ha:H<71 b. If a = 0.10, find the rejection region for the test. Choose the correct answer below. O A. z> 1.28 or z< - 1.28 B. z< - 1.645 O C. z> 1.645 D. z> 1.645 or z< - 1.645 E. z>1.28 O F. z< - 1.28 c. Calculate the value of the test statistic. (Round to two decimal places as needed.) (1,1) More View an example Textbook Statcrunch Clear all Check answer
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