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It has been suggested that pets provide a supportive social function in buffering adverse response to...

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Statistics

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

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