It has been suggested that pets provide a supportive socialfunction in buffering adverse response to physiological stressors.A sample of 20 pet owners were subjected to stressors with theirpets present and their heart rates were measured (mean=75.32 beatsper minute). A previous study found that heart rates of individualsunder stress in this population is normally distributed with mean =82.18 and sigma = 8.15.
A. Construct a 90% confidence interval for μ.
Interpret the 90% confidence interval above:
B. Conduct a 2-sided test to see if the presence of pets wasassociated with reduced stress. Show all hypothesis testingsteps.
i. Hypothesis statements
ii. Test statistic
iii. p-value =
iv. Conclusion of significance
