The mean weight of newborn infants at a community hospital is 6.6 pounds. A sample of seven infants is randomly selected and their weights at birth are recorded as 9.0, 7.3, 6.0, 8.8, 6.8, 8.4, and 6.6 pounds. What is the sample variance?
A) 1.177
B) 6.6
C) 1.385
D) 7.6
E) None of these statements are true

Question

Quizplus · Accepted Answer

The sample variance is calculated by finding the average of the squared differences from the mean. The mean of the sample is 7.27, and the variance is approximately 1.385.

The Mean Weight of Newborn Infants at a Community Hospital