Quality eLine Newsletter
November 2004
Vol. 6, No. 11

Quality Quiz
from Professor Cleary

Congratulations! 
Answer: "B" is the correct response.

Click here for a more complete video explanation.

Marge should stop and consider possibilities that may lie outside her own vision. The coefficient of variation may indeed provide insight into the variability of the two production lines.

The coefficient of the variance measures the ratio of the standard deviation to the mean:

This statistic is excellent for comparing two different scales, such as the difference between the quarter-pound line and the full-pound line. If Marge were to examine the coefficient of variation for lines #1 and #2, she might come to a different conclusion.

Yet another failure has given Marge insight into the relevance of this important statistic.

This statistic is excellent for comparing two different scales, such as the difference between the quarter-pound line and the full-pound line. If Marge were to examine the coefficient of variation for lines #1 and #2, she might come to a different conclusion.

Marge should stop and consider possibilities that may lie outside her own vision. The coefficient of variation may indeed provide insight into the variability of the two production lines.

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