ANOVA Within-Group Sum of Squares

Problem

Return the within-group sum of squares sum over groups of sum((x - group_mean)^2) for a list of groups. Return 0.0 when there are no values.

Hint

Sum the squared deviations from each group's own mean.

case 1

in: [[[1,2,3],[4,5,6],[7,8,9]]]

expected: 6

case 2

in: [[[5,5],[5,5]]]

expected: 0

case 3

in: [[[1],[2],[3]]]

expected: 0

case 4

in: [[[10,20],[30,40]]]

expected: 100

case 5

in: [[]]

expected: 0

Starter codePython

def anova_within_ss(groups):
    # Your code here
    pass

5 test cases · run your code against them in the editor