8.40 Heart rate during laughter. Laughter is often called "theNW best medicine," since studies have shown that laughter canreduce muscle tension and increase oxygenation of theblood. In the International Journal of Obesity (Jan. 2007),researchers at Vanderbilt University investigated the phys-iological changes that accompany laughter. Ninety subjects(18-34 years old) watched film clips designed to evokelaughter. During the laughing period, the researchers mea-sured the heart rate (beats per minute) of each subject,with the following summary results: x = 73.5, s = 6. It iswell known that the mean resting heart rate of adults is71 beats per minute.a. Set up Ho and H₁ for testing whether the true meanheart rate during laughter exceeds 71 beats per minute.b. If a = 05, find the rejection region for thetest.c. Calculate the value of the test statistic.d. Make the appropriate conclusion.

Step 1:Given data :Sample size n=90degrees of freedom df=n−1=90−1=89Sample mean xˉ=73.5Sample…

Answered: 8.40 Heart rate during laughter.…

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.1: Measures Of Center

Problem 4GP

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