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xxoo

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posted by xxoo on 11/3/2009 4:40:11 PM | status: Closed | Earned Karma: 0

Help me please

Course	Textbook	Chapter	Problem	Needs by
Statistics and Probability	N/A	N/A	N/A	11/4/2009 at 8:00:00 PM

Question Details:

How large a sample should be selected to provide a 95% confidence interval with a margin of error of 10 (0 decimals)? Assume that the population standard deviation is 40.
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Tags: Statistics and Probability, Statistics and Probability

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Jonpp

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posted by Jonpp on 11/3/2009 6:52:59 PM | status: Live

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α=0.05, Z(0.025)=1.96 (check normal table)

Take n=62

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