Assume that we want to construct a confidence interval. Do one of thefollowing, asappropriate: (a) find the critical value t Subscript alpha divided by 2

t/2, (b) find the critical value z Subscript alpha divided by 2

z/2, or(c) state that neither the normal distribution nor the t distribution applies.

Here are summary statistics for randomly selected weights of newborngirls: nequals

=227

227, x overbar

xequals

=32.5

32.5 hg, sequals

=7.7

7.7 hg. The confidence level is 99

99%.

Select the correct choice belowand, ifnecessary, fill in the answer box to complete choice.

A.

t Subscript alpha divided by 2

t/2equals

=

(Round to two decimal places asneeded.)

B.

z Subscript alpha divided by 2

z/2equals

=

(Round to two decimal places asneeded.)

C.

Neither the normal distribution nor the t distribution applies