The numbers of regular season wins for 10 football teams in a given season are given below. Determine the range, mean, variance, and standard deviation of the population data set. 2,9,15,2,15,10.14.9.2.7 D. The range is . (Simplify your answer.) The population mean is . (Simplify your answer. Round to the nearest tenth as needed.) The population variance is . (Simplify your answer. Round to the nearest tenth as needed.) The population standard deviation is . (Simplify your answer. Round to the nearest tenth as needed.)