Assume that we want to construct a confidence interval. do one of the following, as appropriate: (a) find the critical value t subscript alpha divided by 2tα/2, (b) find the critical value z subscript alpha divided by 2zα/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: nequals=182, x overbarxequals=32.9 hg, sequals=6.6 hg. the confidence level is 90%. select the correct choice below and, if necessary, fill in the answer box to complete your choice.