(CIRCLE ONE) This is: standard deviation of sample, standard deviation of the population or standard deviation of the estimated population. Computational Formula Definitional Formula X2 X Mean (X - Mean) (X - Mean) EX = E(X2 ) = -- E(X - Mean) = Calculate: 7. Calculate the standard deviation or variance as indicated using the given information. a. Variance = 107.76; Calculate the Standard Deviation. b. Standard Deviation = 73.14; Calculate the Variance. c. Standard Deviation = 5.38; Calculate the Variance