Use the value found in problem 2 to estimate the size of a crowd that is 12 feet deep on both sides of the street standing along a 5,280-foot section of a parade route.

Do one of the following, as appropriate: (a) find the critical value z subscript alpha divided by 2 , (b) find the critical value t subscript alpha divided by 2 . 99%; nequals 17; sigma is unknown; population appears to be normally distributed.