4) A study was conducted to test the hypothesis that people with depression miss more days of work than average. There were 120 participants in the study with diagnosed depression, with an average of 113 days of missed work in a year. The standard deviation from the 120 participants was 10 and the distribution was normal. Construct a 95% confidence interval with an alpha of 0.05 and interpret it for the true mean days of work missed among people with diagnosed depression. a. We are 95% confident that the interval (111.193, 114.807) contains the true value of the mean days of work missed among people with depression. b. We are 95% confident that the interval (106.732, 119.268) contains the true value of the mean days of work missed among people with depression. c. There is a 95% chance that the true mean days of work missed among people with depression will fall within the interval (112.176, 115.792). d. We are 90% confident that the interval (111.193, 114.807) contains the true value of the mean days of work missed among people with depression. e. Both a and c are correct f. We are 90% confident that the interval (1 12.176, 115.792) contains the true value of the mean days of work missed among people with depression