What is the variance of 12,-25,2,3,21,8,10,14,3,18,21 ?

The variance of 12,-25,2,3,21,8,10,14,3,18,21 is 166.89090…

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variance of 12,-25,2,3,21,8,10,14,3,18,21

variance

12, - 25, 2, 3, 21, 8, 10, 14, 3, 18, 21

166.89090 \dots

Solution steps

Compute the average,

\overset{x}{ˉ} : 7.90909 \dots

Compute

i = 1 \sum n (x_{i} - \overset{x}{ˉ})^{2} : 1668.90909 \dots

Compute the number of terms in the data set:

n = 11

Compute

Va r (X) = i = 1 \sum n \frac{( x _{i} - x ˉ ) ^{2}}{n - 1} : 166.89090 \dots

166.89090 \dots

10 C 6

2, 2, 1, 3, 1, 3, 1, 2, 3, 2, 4, 2, 2, 1

18, 16, 13, 14, 14

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

P (12, 9)

What is the variance of 12,-25,2,3,21,8,10,14,3,18,21 ?
The variance of 12,-25,2,3,21,8,10,14,3,18,21 is 166.89090…