2. Assume 11 power wrenches used on an assembly line of a manufacturing company are randomly selected. The sample standard deviation of the amounts of torque applied is 0.62 foot-pound. a. (10 points) Test the claim that the population standard deviation of the amounts of torque applied is less than 0.65 foot-pound using = 0.10. H0 : H1 : Critical number(s) = Round the same as the critical number(s). Test statistic = H0 There sufficient evidence to the claim that the population standard deviation of the amounts of torque applied is less than 0.65 foot-pound. b. Find a 99% confidence interval estimating the population standard deviation of the the amounts of torque applied. (10 points) Values from the appropriate table = Round to two decimal places. Include units. Confidence interval =