The weights (in grams) of the contents of several small bottles are 4, 2, 5, 4, 5, 2 and 6. What is the sample variance?
A) 6.92
B) 4.80
C) 1.96
D) 2.33

Question

Quizplus · Accepted Answer

The sample variance is calculated by finding the mean of the data, then finding the squared differences from the mean, summing them, and dividing by the number of data points minus one. The mean is 4, the squared differences are 0, 4, 1, 0, 1, 4, 4, summing to 14. Dividing by 6 gives a variance of 2.33.

The Weights (In Grams) of the Contents of Several Small