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

=187

187, x overbar

xequals

=28.1

28.1 hg, sequals

=7.3

7.3 hg. The confidence level is 99

99%.