Aikeelorence8viz
Answered

compute the population variance of this population:2,5,7,9,10,11,12 of size 5 ,consider all samples​

Sagot :

Swiftphia23viz

Answer:

s² = Σ(X - X̅)²/n-1

X̅ = 8

2-8 = -6 or 36

5-8= -3 or 9

7-8= -1 or 1

9-8= 1 or 1

10-8= 2 or 4

11-8 = 3 or 9

12-8= 4 or 16

Σ(X - X̅)² = 76

s² = Σ(X - X̅)²/n-1

s² = 76/ 7-1

s² = 76/ 6

s² = 12.67