What is the variance of 4,2,5,4,5,2,6 ?

The variance of 4,2,5,4,5,2,6 is 2.33333…

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variance of 4,2,5,4,5,2,6

variance

4, 2, 5, 4, 5, 2, 6

2.33333 \dots

Solution steps

Compute the average,

\overset{x}{ˉ} : 4

Compute

i = 1 \sum n (x_{i} - \overset{x}{ˉ})^{2} : 14

Compute the number of terms in the data set:

n = 7

Compute

Va r (X) = i = 1 \sum n \frac{( x _{i} - x ˉ ) ^{2}}{n - 1} : 2.33333 \dots

2.33333 \dots

21 C 3

52 P 4

6, 7, 8, 9, 6, 7, 8, 5, 7, 9, 6, 7, 8, 5, 10

10 c m

6 C 4

What is the variance of 4,2,5,4,5,2,6 ?
The variance of 4,2,5,4,5,2,6 is 2.33333…