A physician employed by a large corporation believes that employees have gained

body fat as a result of working from home during the pandemic. In 1970, the corporation measured the percentage of body fat for every employee. The scores were normally distributed with a mean of 22% body-fat. The physician measures the body fat percentage in a random sample of 12 workers employed by the corporation. The body fat percentages found were as follows: 23, 39, 28, 31, 32, 24, 15, 22, 18, 25, 16, 27

a) Use a directional hypothesis with = .05 to determine whether the physician's beliefs are accurate. (15 marks)

Please complete the following 5 steps:

Step 1: State the hypotheses (null and alternative)

Step 2: Decision Criterion (locate the critical region)

Step 3: Obtain a Statistic

Step 4: Make a Decision

Step 5: Report the Result

b) Report and interpret the effect size usingcohen's d (5 marks).

c) Report and interpret the 99% confidence interval (5 marks).