Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value

t/2,

(b) find the critical value

z/2,

or (c) state that neither the normal distribution nor the t distribution applies.Here are summary statistics for randomly selected weights of newborn girls:

n=202,

x=31.5

hg,

s=7.7

hg. The confidence level is

95%.

Select the correct choice below and, if necessary, fill in the answer box to complete your choice.

A.

t/2=enter your response here

(Round to two decimal places as needed.)

B.

z/2=enter your response here

(Round to two decimal places as needed.)

C.

Neither the normal distribution nor the t distribution applies.