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

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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ISBN:9780079039897
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Chapter4: Equations Of Linear Functions
Section4.5: Correlation And Causation
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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)
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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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