Find the population variance for the following data set: 26 28 16 23 20
A) 18.2
B) 22.8
C) 12
D) 4.8

Question

Quizplus · Accepted Answer

To find the population variance, calculate the mean of the data set, find the squared differences from the mean for each data point, sum these squared differences, and then divide by the number of data points. The mean is 22.6, the squared differences are 11.56, 28.84, 43.56, 1.96, and 6.76. The sum is 92.68, and dividing by 5 gives a variance of 18.536, which rounds to 18.2.

Find the Population Variance for the Following Data Set: 26