135 Review Worksheet for EXAM 2 Measures of Variability and Correlation Standard Deviation of Sample Standard Deviation of Sample (Computational - Shortcut) (Definitional) SX = [(x2 ) _ (2x)2 N Sy = ( x-x) 2 N N Standard Deviation of Estimated Population Sample's Santard Deviation Standard Deviation of Estimated Population (Computational - Shortcut) (Definitional) SX = E(xz) _(2x)2 E(x-x) 2 SX = N- 1 N-1 Population's Standard Deviation Sample's Standard Deviation: o = Standard Deviation of Population S. = Standard Deviation of Sample u = mean of population S. = Standard Deviation of Estimated Population * = mean of sample 1. You measure the temperature for the last 12 days. The temperatures in Fahrenheit have been the following: Case OF #1 62 #2 55 #3 64 #4 65 #5 68 #6 68 #7 69 #8 72 #9 73 #10 79 #11 74 #12 83 a. What is the mean