Heart rate during laughter. Laughter is often called “the best medicine,” since studies have shown that laughter can reduce muscle tension and increase oxygenation of the blood. In the International Journal of Obesity (Jan. 2007), researchers at Vanderbilt University 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: Mean = 73.5, Standard Deviation = 6. n=90 (we can treat this as a large sample and use z) It is well known that the mean resting heart rate of adults is 71 beats per minute. Based on the research on laughter and heart rate, we would expect subjects to have a higher heart beat rate while laughing. Construct 95% Confidence interval using z value. What is the lower bound of CI? a) Calculate the value of the test statistic.(z*) b) If alpha = 05, find the critical value of the rejection region for this test. c) What is your conclusion in regards to the Null Hypothesis?
-
Heart rate during laughter. Laughter is often called “the best medicine,” since studies have shown that laughter can reduce muscle tension and increase oxygenation of the blood. In the International Journal of Obesity (Jan. 2007), researchers at Vanderbilt University 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:
-
Mean = 73.5,
-
Standard Deviation = 6.
n=90 (we can treat this as a large sample and use z)It is well known that the mean resting heart rate of adults is 71 beats per minute. Based on the research on laughter and heart rate, we would expect subjects to have a higher heart beat rate while laughing.
Construct 95% Confidence interval using z value. What is the lower bound of CI?
-
a) Calculate the value of the test statistic.(z*)
-
b) If alpha = 05, find the critical value of the rejection region for this test.
-
c) What is your conclusion in regards to the Null Hypothesis?
-
Trending now
This is a popular solution!
Step by step
Solved in 4 steps with 3 images
