For all questions, no work needed, only solutions in 4 decimal places:

Use technology to construct the confidence intervals for the population variance o2 and the population standard deviation o. Assume the sample is taken from a normally distributed population. c = 0.99, $2 = 7.84, n = 30 The confidence interval for the population variance is (] (Round to two decimal places as needed.)The diameters (in inches) of 17 randomly selected bolts produced by a machine are listed. Use a 90% level of confidence to construct a confidence interval for (a) the population variance o2 and (b) the population standard deviation o. Interpret the results. 4.482 4.411 4.009 4.308 4.009 3.767 3.818 3.747 4.219 3.975 4.156 4.555 3.962 3.734 3.848 3.802 4.438The number of hours of reserve capacity of 10 randomly selected automotive batteries is shown to the 1.73 1.85 1.51 1.66 1.71 right. 1.97 1.39 1.58 1.46 2.02 Assume the sample is taken from a normally distributed population. Construct 99% confidence intervals for (a) the population variance 62 and (b) the population standard deviation o