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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

equals28.4​hg,

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

equals27.8​hg, 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.

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