The 2006 GSS reports the number of weeks respondents worked in the year prior. Answer questions using the following selection from this sample:
25, 29, 32, 38, 42, 46, 50, 52
-What is the variance?

Question

Quizplus · Accepted Answer

To calculate the variance, first find the mean of the data set: (25 + 29 + 32 + 38 + 42 + 46 + 50 + 52) / 8 = 39.25. Then, find the squared differences from the mean, sum them, and divide by the number of data points: [(25-39.25)² + (29-39.25)² + (32-39.25)² + (38-39.25)² + (42-39.25)² + (46-39.25)² + (50-39.25)² + (52-39.25)²] / 8 = 99.1.

The 2006 GSS Reports the Number of Weeks Respondents Worked