Here are summary statistics for randomly selected weights of newborn girls: n=215, x=27.2 hg, s= 6.8 hg.
Construct a confidence interval estimate of the mean. Use a 90% confidence level. Are these results very different
from the confidence interval 25.8 hg << 27.6 hg with only 18 sample values, x = 26.7 hg, and s= 2.3 hg?
What is the confidence interval for the population mean µ?
hgμ
