Asked by Joan
A score that is 10 points below the mean corresponds to a z-score of z=-2.00. What is the population standard deviation?
Answers
Answered by
drwls
If z = -2, the score is 2 standard deviations below the mean. It is also 10 points below the mean.
-2*sigma = -10
The standard deviation (sigma) is therefore 5.
-2*sigma = -10
The standard deviation (sigma) is therefore 5.
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