Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value t.a. (b) find the critical value z,12. 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= 281, x= 32.3 hg, s=7.8 hg. The confidence level is 99%. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. ta/2= (Round to two decimal places as needed.) O B. Za/2= (Round to two decimal places as needed.) O C. Neither the normal distribution nor the t distribution applies.

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.2.8-T
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, 12, or (c) state that neither the normal distribution nor the t distribution applies.
Here are summary statistics for randomly selected weights
I newborn girls:n= 281, x = 32.3 hg, s= 7.8 hg. The confidence level
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.)
O B. Za/2=
(Round to two decimal places as needed.)
O C. Neither the normal distribution nor the t distribution applies.
Transcribed Image Text:.2.8-T 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, 12, or (c) state that neither the normal distribution nor the t distribution applies. Here are summary statistics for randomly selected weights I newborn girls:n= 281, x = 32.3 hg, s= 7.8 hg. The confidence level 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.) O B. Za/2= (Round to two decimal places as needed.) O C. Neither the normal distribution nor the t distribution applies.
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