#10 A study of the amount of time it takes a qualified mechanic to do the 40,000mile service on a 2016Envoy SUV shows that the mean time is 4.75hours with a standard deviation of 0.79hours. If 28mechanics are selected at random, find the probability that their meantime to do the 40,000 mile service is more than 4.8hours.

#16 Find the minimum sample sizenrequired to form a 90%confidence interval about the population mean where the error will be within 1.4 cm of the population mean. Assume the standard deviation is 15.7 cm.

#17 A pollster wants to estimate the proportionpof United States voters whofavor capital punishment. (10 pts total)(a)If no preliminary estimate is given for p, what is the minimumsamplesizethat is needed to be 95% confident that the sampleproportion will not differ from the true proportion by more than 2.8%? (6 pts)

(b) If a prior study indicated that 55% of the United States voters are in favor of capital punishment find the minimum sample sizeneededto be 95% confident that the sample proportion will not differ fromthe true proportion by more than 3%. (4 pts