What is the variance of 8,4,9,2,8,2,6,2,2,4 ?

The variance of 8,4,9,2,8,2,6,2,2,4 is 8.01111…

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variance of 8,4,9,2,8,2,6,2,2,4

variance

8, 4, 9, 2, 8, 2, 6, 2, 2, 4

8.01111 \dots

Solution steps

Compute the average,

\overset{x}{ˉ} : 4.7

Compute

i = 1 \sum n (x_{i} - \overset{x}{ˉ})^{2} : 72.1

Compute the number of terms in the data set:

n = 10

Compute

Va r (X) = i = 1 \sum n \frac{( x _{i} - x ˉ ) ^{2}}{n - 1} : 8.01111 \dots

8.01111 \dots

What is the variance of 8,4,9,2,8,2,6,2,2,4 ?
The variance of 8,4,9,2,8,2,6,2,2,4 is 8.01111…