In: Statistics and Probability
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=243243,
x overbarxequals=29.329.3
hg,
sequals=6.56.5
hg. The confidence level is
9999%.
Select the correct choice below and, if necessary, fill in the answer box to complete your choice.
A.
t Subscript alpha divided by 2tα/2equals=nothing
(Round to two decimal places as needed.)
B.
z Subscript alpha divided by 2zα/2equals=nothing
(Round to two decimal places as needed.)
C.
Neither the normal distribution nor the t distribution applies.