- Assume That We Want To Construct A Confidence Interval Do One Of The Following As Appropriate A Find The Critical V 1 (52.07 KiB) Viewed 41 times
Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value tα/2, (b) find the critical value zα/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=272,xˉ=29.3 hg, s =7.2 hg. The confidence level is 99%. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. tα/2= (Round to two decimal places as needed.) B. zα/2= (Round to two decimal places as needed.) C. Neither the normal distribution nor the t distribution applies.