# Question: here are summary statistics for randomly selected weights of newborn...

###### Question details

Here are summary statistics for randomly selected weights of newborn girls:

nequals

246

,

x overbar

equals28.4hg,

sequals

7.9hg. Construct a confidence interval estimate of the mean. Use a

90

%

confidence level. Are these results very different from the confidence interval

26.2

hgless than

muless than29.4hg with only

15

sample values,

x overbar

equals27.8hg, and

sequals

3.5

hg?

What is the confidence interval for the population mean

mu

?

nothing

hgless than

muless thannothing

hg (Round to one decimal place as needed.)

Are the results between the two confidence intervals very different?

A.

No, because the confidence interval limits are similar.

B.

Yes, because the confidence interval limits are not similar.

C.

Yes, because one confidence interval does not contain the mean of the other confidence interval.

D.

No, because each confidence interval contains the mean of the other confidence interval.