If a sample includes three individuals with scores of 4,6,and 8,the estimated population variance is
A)(2 + 0 + 2)/ 3 = 1.33
B)(2 + 0 + 2)/ 2 = 2
C)(4 + 0 + 4)/ 3 = 2.67
D)(4 + 0 + 4)/ 2 = 4

Question

Quizplus · Accepted Answer

The estimated population variance uses the formula for sample variance: sum of squared deviations from the mean divided by (n-1). Here, the mean is 6, deviations are 2, 0, and 2, squared deviations are 4, 0, and 4. Sum is 8, divided by (3-1) = 2, giving 4.

If a Sample Includes Three Individuals with Scores of 4,6,and