A large family-held department store had the business objective of improving its response to complaints The variatle of interest was defined as the r between when the complaint was made and when it was resolved Data were collected from 40 complaints that were made in the last year Use the da (a) through (d) below I Click the icon to view the data table a Construct a 95% confidence interval estimate for the population mean number of days between the receipt of a complant and the resolution of the c The 95% confidence interval estimate is from 28.4 days to 53.1 days (Round to one decimal place as needed.) b. What assumption must you make about the population distribution in order to construct the confidence interval estimate in (a)? OA The number of days to resolve complaints follows the I distribution B The number of complaints per day follows the t distribution OC The number of complain per day is normally distributed O The number of days to resolve complaints is normally distrībuted. c. Do you think that the assumption needed in order to construct the confidence interval estimate in (a) is valid? Explain O A Yes, the data suggest the population distribution approximately follows the I distribution O8. No, the data suggest the population distribution is skewed to the right OC. Yes, the data suggest the population distribution is approximately normal. OD. No, the data suggest the population distribution is skewed to the left Complaint Data Days Between Complaint and Resolution of Complaint 7 24 20 19 26 93 64 32 18 28 45 24 33 69 16 26 26 37 162 34 111 1 2 27 115 17 7 45 152 16 64 12 81 26 10 49 42 29 14