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=240?, x=32.9 ?hg, s=6.5 hg. The confidence level is 99?%.

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

A.

t?/2=

nothing

?(Round to two decimal places as?needed.)

B.

z?/2=

nothing

?(Round to two decimal places as?needed.)

C.

Neither the normal distribution nor the t distribution applies.

Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value to / 2, (b) find the critical value Za / 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 = 240, x = 32.9 hg, s = 6.5 hg. The confidence level is 99%. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. ta/2= (Round to two decimal places as needed.) OB. Za/ 2 = (Round to two decimal places as needed.) O C. Neither the normal distribution nor the t distribution applies