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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=73.7, s= 4, It is well known that the mean resting heart rate of adults is 71 beats per minute. Complete parts a through d below. 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. O B. Ho: H= 71 O'A. Ho:H=71 Ha:H<71 Ha: u#71 O D. Ho: H#71 H3:H= 71 Yc. Họ: H=71 Ha: µ>71 b. If a = 0.01, find the rejection region for the test. Choose the correct answer below. O B. z< - 2.575 O A. z< - 2.33 O D. z>2,575 or z< - 2.575 O C. z>2.575 O F. z>2.33 or z< - 2.33 VE. z>2.33 c. Calculate the value of the test statistic. (Round to two decimal places as needed.)

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=73.7, s= 4, It is well known that the mean resting heart rate of adults is 71 beats per minute. Complete parts a through d below. 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. O B. Ho: H= 71 O'A. Ho:H=71 Ha:H<71 Ha: u#71 O D. Ho: H#71 H3:H= 71 Yc. Họ: H=71 Ha: µ>71 b. If a = 0.01, find the rejection region for the test. Choose the correct answer below. O B. z< - 2.575 O A. z< - 2.33 O D. z>2,575 or z< - 2.575 O C. z>2.575 O F. z>2.33 or z< - 2.33 VE. z>2.33 c. Calculate the value of the test statistic. (Round to two decimal places as needed.)

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section4.5: Correlation And Causation
Problem 24PFA
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8.4.40 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=73.7, s = 4. It is well known that the mean resting heart rate of adults is 71 beats per minute. Complete parts a through d below. 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. O A. Ho: H=71 Ha:H<71 O B. Ho: H=71 Ha: H#71 YC. Ho: H=71 O D. Ho: H#71 Hai H>71 Ha:u=71 b. If a = 0.01, find the rejection region for the test. Choose the correct answer below. O A. z< - 2.33 O B. z< - 2.575 O C. z>2.575 O D. z>2.575 or z< - 2.575 VE. z>2.33 O F. z>2.33 or z< - 2.33 c. Calculate the value of the test statistic. (Round to two decimal places as needed.)
Transcribed Image Text:8.4.40 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=73.7, s = 4. It is well known that the mean resting heart rate of adults is 71 beats per minute. Complete parts a through d below. 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. O A. Ho: H=71 Ha:H<71 O B. Ho: H=71 Ha: H#71 YC. Ho: H=71 O D. Ho: H#71 Hai H>71 Ha:u=71 b. If a = 0.01, find the rejection region for the test. Choose the correct answer below. O A. z< - 2.33 O B. z< - 2.575 O C. z>2.575 O D. z>2.575 or z< - 2.575 VE. z>2.33 O F. z>2.33 or z< - 2.33 c. Calculate the value of the test statistic. (Round to two decimal places as needed.)
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