John needs to buy plastic forks. Brand A has a box of 25 forks for $1.99. Brand B has a box of forks for $3.89 find the unit price for each brand Unit price for brand b: Unit price for brand A:

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.