For a sample of 10 days, Harkin Research recorded the number of visitors to Tilton.com's website.Determine the variance for the data.Treat the data as a sample. 100, 100, 106, 93, 89, 95, 97, 181, 99, 100
A)26.75
B)715.8
C)654.9
D)515.2
E)32.7

Question

Quizplus · Accepted Answer

To calculate the variance for a sample, we first find the mean (average) of the data, then subtract the mean from each data point, square the result, sum these squared differences, and finally divide by the number of data points minus one. For the given data: Mean = (100 + 100 + 106 + 93 + 89 + 95 + 97 + 181 + 99 + 100) / 10 = 1060 / 10 = 106. The squared differences from the mean are then calculated for each data point, summed, and divided by (n-1) = 9 (since it's a sample and not a population). The calculation yields a variance of approximately 715.8.

For a Sample of 10 Days, Harkin Research Recorded the Number