• a) Make a rough guess about the amount of variability you think each group has (a great deal, a moderate amount, very little) and explain how you came to this rationale.
• b) Calculate the actual variance and standard deviation for each group, using the correctsample formula(n-1 in the denominator). Were your estimates from (a) accurate?
• c) Calculate variance and standard deviation for each group again, but this time using thepopulation formula(N in the denominator).How are your values different from what you obtained in (b)? Why is that?

Dataset 1:

Mean = 9.8

Median = 14

Mode= 15

Dataset 2:

Mean = 15.65

Median = 15

Mode= 15, 10, 23

Dataset 3:

Mean = 23.24

Median = 16

Mode= 13, 16