In general, round z scores to 2 decimal places and probabilities to 4 decimal places. 1. As part of a study of property values in Minneapolis, an appraisal company chose a random sample of 40 apartment buildings and determined each building's age as of January last year. The ages (in years) of the buildings are listed below: 83 71 70 20 72 63 54 33 66 67 60 19 22 67 73 52 51 83 13 14 19 20 22 23 19 68 51 59 72 64 73 65 87 80 70 57 83 19 85 76 a. Use your calculator functions to determine the sample mean and sample standard deviation. Round each to two decimal places. (3 pts.) b. Use the results of (a) to construct a 99% confidence interval estimate of the mean age of apartment buildings in Minneapolis. Round the margin of error and bounds to two decimal places. (6 pts.)