028/quizzes/1339007/take Question 20 Directions: Use these formulas as needed to calculate the question below: Mean (): = n n i=1 xi Sum of Squares (SS): SS = n (xX1-11)2 Standard Deviation (o) = 0 1 n (xi - ) n-1 i=1 Researchers collected the following set of data: 8, 13, 13, 13, 14, 19, 22, 28, 30. If the sum of squares equals 451.6, which quantity equals the variance? 14.0 41.7 56.4 59.2 16 JAN 19 3 2 tv *