Determine the variance of the following population of survey data: 3, 4, 4, 1, 2
A) 1.17
B) 1.36
C) 1.70
D) 1.30

Question

Quizplus · Accepted Answer

The variance is calculated by finding the mean of the data, then finding the squared differences from the mean, and finally averaging those squared differences. The mean is 2.8, and the squared differences are 0.04, 1.44, 1.44, 3.24, and 0.64. The average of these squared differences is 1.36.

Determine the Variance of the Following Population of Survey Data