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(Solved): As part of a water quality survey, you test the water hardness in several randomly selected streams. ...
As part of a water quality survey, you test the water hardness in several randomly selected streams. The results are shown below. Construct a confidence interval for the population variance
\sigma ^(2)and the population standard deviation
\sigma . Use a
90%level of confidence. Assume that the population has a normal distribution.
n=24
s=15 grains per gallon What is the confidence interval for the population variance
\sigma ^(2)?
?
?(Round to one decimal place as needed.)
