A researcher hypothesized that people who exercise regularly are not sick as often as people who...

A researcher hypothesized that people who exercise regularly are not sick as often as people who don’t exercise regularly. She randomly selected a group of exercisers and a group of non-exercisers and recorded the number of sick days they took of work for one year. The data are recorded below. Is there support for her hypothesis, α = .05?

Non-exercisers Exercisers

6 7 3 5

8 12 2

6 9 8

9 4

Test the hypothesis using the 5-step procedure. (22 points)
Calculate the 95% confidence interval. (4 points)
Calculate and estimate the effect size. (4 points)
Assuming you expected a large effect size, what is the minimum number of participants per group you’d need to attain at least 80% power? (2 points)
(Note: this is for T-test statistics in psychology)

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Expert Solution

This includes effect size, CI,two sample t test.pl?☺️

orchestra answered 1 year ago

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