The accompanying frequency distribution summarizes sample data consisting of ages of randomly selected inmates in federal prisons. Use the data to construct a 90% confidence interval estimate of the mean age of all inmates in federal prisons. D Age (years) 16-25 Number 12 26-35 62 36-45 67 46-55 35 56-65 14 Over 65 6 Using the class limits of 66-75 for the "over 65" group, find the confidence interval. (Round to one decimal place as needed.)