Interpret the SD: Scores vary from the mean of on average by (SD). 4. We are looking at all the Gorilla's ages at a local zoo: 8, 4, 14, 16, 8 CIRCLE ONE) This is: standard deviation of sample, standard deviation of the population or standard deviation of the estimated population. Computational OR Definitional Formula Formula X X2 X Mean (X - Mean) (X - Mean) EX = E (X2 ) = E(X - Mean) = Calculate: You have found the following ages (in years) of 6 lions. Those lions were randomly selected from the 22 lions at your local zoo: 13, 2, 1, 5, 2, 7 (CIRCLE ONE) This is: standard deviation of sample, standard deviation of the population or standard deviation of the estimated population. Computational OR Definitional Formula Formula X X2 X Mean (X - Mean) (X - Mean) EX = E(X2 ) = E(X - Mean) = Calculate