The numbers of regular season wins for 10 football teams in a given season are given below. Determine the range, mean, variance, and standared deviation of the population data set. 2,10,15,2,15,8,15,9,4,9 Solution Range = Maximum - Minimum = 15 - 2 = 13 Mean = sum of all the values/ total of values = (2+10+15+2+15+8+15+9+4+9)/10 = 8.9 Standard deviation = 4.825971405 Variance = 23.2921015215815949.