Question

Here are summary statistics for randomly selected weights of newborn​ girls: n equals=171​,

x over barx equals=30.6 hg,

s equals=6.56.5 hg. Construct a confidence interval estimate of the mean. Use a

90​% confidence level. Are these results very different from the confidence interval 29.629.6

h gless than<muμless than<31.231.2 hg with only 20 sample​ values,

x overbarx equals=30.4 hg, and s equals=2.12.1 hg?

What is the confidence interval for the population mean

hg ​(Round to one decimal place as​ needed.)

Answer 1