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. Age (years) Number 16-25 13 26-35 62 36-45 66 46-55 37 56-65 15 Over 65 Using the class limits of 66-75 for the "over 65" group; find the confidence interval < < (Round to one decimal place as needed.)