Question

In: Statistics and Probability

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

  1. 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

  1. Test the hypothesis using the 5-step procedure. (22 points)
  2. Calculate the 95% confidence interval. (4 points)
  3. Calculate and estimate the effect size. (4 points)
  4. 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)
  5. (Note: this is for T-test statistics in psychology)

Solutions

Expert Solution

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

orchestra answered 1 year ago
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