What is the variance of 9,4,4,4,6,6 ?

The variance of 9,4,4,4,6,6 is 3.9

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variance of 9,4,4,4,6,6

variance

9, 4, 4, 4, 6, 6

3.9

Solution steps

Compute the average,

\overset{x}{ˉ} : 5.5

Compute

i = 1 \sum n (x_{i} - \overset{x}{ˉ})^{2} : 19.5

Compute the number of terms in the data set:

n = 6

Compute

Va r (X) = i = 1 \sum n \frac{( x _{i} - x ˉ ) ^{2}}{n - 1} : 3.9

3.9

C (7, 2)

7 p 5

104.9, 128.9, 314.8, 134.9, 123.5, 141.4

C (8, 3)

25, 13, 13, 5, 69