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, 19, 23, 14, 14, 17, 21, 17, 15, 16 The range is To find the range, you will have to fine the MIN and MAX of the data, then subtract the Max from the Min and you'll get 11 The mean is Use Microsoft Excel to calculate the Mean. Here's the formular =average(range) The variance is To Calculate the variance in excel Here's the formular, =var.s(range) The standard deviation is Here's the formular to calculate the standard deviation in excel =Stdev.s(range)