Here's the question you clicked on:
nisha.welb
The mean of this data set is 9. What is the variance of the data set? 5, 6, 7, 10, 17 a.23.5 b. 18.8 c. 3.6 d. 4.5
u knw the formula of variance
then find in book and simply put the values and calculate it. it is very easy to do.