variance of 90.4,80.43,100.54,91.32,102.23,109.43,101.32,82.43,79.33,92.3

Solution

variance

90.4, 80.43, 100.54, 91.32, 102.23, 109.43, 101.32, 82.43, 79.33, 92.3

105.31951 \dots

Solution steps

Compute the average,

\overset{x}{ˉ} : 92.973

Compute

i = 1 \sum n (x_{i} - \overset{x}{ˉ})^{2} : 947.87561

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} : 105.31951 \dots

105.31951 \dots

C (6, 2)

100, 140, 130, 180, 80, 160

10.5, 3.3, 5.3

19 C 2

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

What is the variance of 90.4,80.43,100.54,91.32,102.23,109.43,101.32,82.43,79.33,92.3 ?
The variance of 90.4,80.43,100.54,91.32,102.23,109.43,101.32,82.43,79.33,92.3 is 105.31951…