QUESTION 1 The rates of return on 7 natural resources mutual funds are given below: 16.83 17.77 14.87 18.88 16.55 14.44 15.89 Suppose that the rates are approximately normal. (a) Compute the mean and the standard deviation rate of return of natural resources mutual funds. Round your answer to three decimal places. (b) Calculate the lower confidence limite and the upper confidence limite of the 99% confidence interval for p, the mean rate of For Blank 3 iatural resources mutual funds. Round your answer to three decimal places. QUESTION 2 A Hi-Tech company has introduced a new ash disk. Some dealers and customers have complained that some of the new disks are defective. In order to investigate this the company randomly tested n disks and found that 6.93% were defective. Find the appropriate sample size necessary to achieve a margin of error of 0.056 in order to construct a 97% confidence interval for the proportion of all ash disks that are defective. Round your answer to the nearest integ (whole number). QUESTION 3 A researcher wants to calculate a 95% condence interval for the unknown true proportion of defective resistors off an assembly line. He takes a random sample of 226 resistors, and nds that 38 of them are defective. Find the margin of error to construct the 95% confidence interval? Round your answer to four decimal places. 4 points 4 points 4 points Save Answer Save Answer Save