The formula for the confidence interval for the standard deviation given on the homework is wrong, but the formula given in class today is correct. In the numerator, we need sx ^ 2, not just sx as is written on the homework. Make sure to make this correction to the formula before working on the answer.
Wednesday, March 18, 2009
CORRECTION ON HOMEWORK 8
The formula for the confidence interval for the standard deviation given on the homework is wrong, but the formula given in class today is correct. In the numerator, we need sx ^ 2, not just sx as is written on the homework. Make sure to make this correction to the formula before working on the answer.
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