Dawson Products had 20 losses in 1999, 21 in 2000, 43 in 2001, 38 in 2002, and 29 in 2003. What is the standard deviation of losses?

Question

Quizplus · Accepted Answer

The standard deviation is calculated by finding the square root of the variance. First, calculate the mean (average) of the losses: (20 + 21 + 43 + 38 + 29) / 5 = 30.2. Then, find the variance by averaging the squared differences from the mean: [(20-30.2)^2 + (21-30.2)^2 + (43-30.2)^2 + (38-30.2)^2 + (29-30.2)^2] / 5 = 414.8. Finally, the standard deviation is the square root of the variance, which is √414.8 ≈ 20.37.

Dawson Products Had 20 Losses in 1999, 21 in 2000