What is the variance of 5,4,2,1,1,2,10,2,3,5 ?

The variance of 5,4,2,1,1,2,10,2,3,5 is 7.38888…

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variance of 5,4,2,1,1,2,10,2,3,5

variance

5, 4, 2, 1, 1, 2, 10, 2, 3, 5

7.38888 \dots

Solution steps

Compute the average,

\overset{x}{ˉ} : 3.5

Compute

i = 1 \sum n (x_{i} - \overset{x}{ˉ})^{2} : 66.5

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} : 7.38888 \dots

7.38888 \dots

11 n C r 3

50 C 2

3, 3, 3, 8, 8, 8, 11, 11, 11

69, 73, 65, 70, 71, 74, 65, 69, 60, 62

C (5.3)

What is the variance of 5,4,2,1,1,2,10,2,3,5 ?
The variance of 5,4,2,1,1,2,10,2,3,5 is 7.38888…