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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 confidence interval for the population variance o2 and the population standard deviation o. Use a 99% level of confidence. Assume that the population has a normal distribution. n = 17 s = 13 grains per gallon What is the confidence interval for the population variance o2? (Round to one decimal place as needed.) What is the confidence interval for the population standard deviation o? (Round to one decimal place as needed.)The annual earnings of 13 randomly selected computer software engineers have a sample standard deviation of $3728. Assume the sample is from a normally distributed population. Construct a confidence interval for the population variance o2 and the population standard deviation o. Use a 95% level of confidence. Interpret the results. What is the confidence interval for the population variance o2? (Round to the nearest integer as needed.)Use technology to construct the confidence intervals for the population variance 62 and the population standard deviation o. Assume the sample is taken from a normally distributed population. c = 0.99, s2 = 7.84, n = 30 The confidence interval for the population variance is ( 4.34 , 17.33 ). (Round to two decimal places as needed.) The confidence interval for the population standard deviation is (Round to two decimal places as needed.)