Here are summary statistics for randomly selected weights of newborn girls: nequals=225x overbarxequals=28.7hg, sequals=7.5hg. Construct a...

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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?

math Statistics-And-Probability

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Answer 1

Answer #1

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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Answer 2

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