Calculate ss, variance, and standard deviation for the following population of n = 7 scores: 8, 1, 4, 3, 5, 3, 4. Note: The definitional formula for ss works well with these scores.
a) 20, 4, 2
b) 29, 4.14, 2.04
c) 25, 3.57, 1.89
d) 30, 4.28, 2.07