What is the age distribution of adult shoplifters (21 years ofage or older) in supermarkets? The following is based oninformation taken from the National Retail Federation. A randomsample of 895 incidents of shoplifting gave the following agedistribution. Estimate the mean age, sample variance, and samplestandard deviation for the shoplifters. For the class 41 and over,use 45.5 as the class midpoint. (Round your answers to one decimalplace.)
| Age range(years) | 21-30 | 31-40 | 41 and over |
| Number ofshoplifters | 276 | 350 | 269 |
