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Construct a confidence interval for: a. the population variance b. population standard deviation Use a 99% level of confidence. Assume that the population has a

Construct a confidence interval for:
a. the population variance
b. population standard deviation
Use a 99% level of confidence. Assume that the population has a normal distribution.
As part of a water quality survey, you test the water hardness in several randomly selected streams. The results are Question list K shown below. Construct a confidence interval for the population variance of and the population standard deviation o. Use a 99% level of confidence. Assume that the population has a normal distribution. n =22 s = 18 grains per gallon O Question 8 O Question 9 What is the confidence interval for the population variance o2? ((Round to one decimal place as needed.)

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