A store manager tracks the number of customer complaints each week.The following data reflect a random sample of ten weeks.
The variance for these data is approximately 27.78.

Question

A store manager tracks the number of customer complaints each week.The following data reflect a random sample of ten weeks.
  The variance for these data is approximately 27.78.

Quizplus · Accepted Answer

We cannot determine the exact variance of the sample from the given information. However, if we assume that the sample is drawn from a normal distribution, we can estimate the variance using the sample variance. In this case, the estimated variance is 27.78.

A Store Manager Tracks the Number of Customer Complaints Each