The ages (in years) of a random sample of shoppers at a gaming store are shown. Determine the range, mean, variance, and standard deviation of the sample data set. 12, 17, 23, 13, 21, 17, 20, 18, 14, 17 The range is ___ (Simplify your answer.) The mean is ____ (Simplify your answer. Round to the nearest tenth as needed.) The variance is ____ (Simplify your answer. Round to the nearest tenth as needed.) The standard deviation is ____ (Simplify your answer. Round to the nearest tenth as needed.)