Here are summary statistics for randomly selected weights of newborn girls: nequals=225x overbarxequals=28.7hg, sequals=7.5hg. Construct a...
Here are summary statistics for randomly selected weights of newborn girls:
nequals=225x overbarxequals=28.7hg, sequals=7.5hg. Construct a confidence interval estimate of the mean. Use a 98% confidence level. Are these results very different from the confidence interval
26.6hg less than<muμ less than<30.6hg with only
17 sample values, x overbarxequals=28.6 hg, and sequals=3.2 hg?
Homework Answers
Ans:
98% confidence interval for mean
=28.7+/-2.326*(7.5/sqrt(225))
=28.7+/-1.2
=(27.5, 29.9)
No both are not different,as limits of above CI are contained in given interval
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