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As part of a water quality survey, you test the water hardness in several randomly selected streams. The results are shown below. Construct a
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 a2 and the population standard deviation a. Use a 99% level of confidence. Assume that the population has a normal distribution. n = 17 s=12 grains per gallon What is the confidence interval for the population variance a? (Round to one decimal place as needed.)
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