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posted by Anonymous on 11/3/2009 3:42:23 PM | status: Live | Earned Karma: 0

Statistics Margin Of Error

Course	Textbook	Chapter	Problem	Needs by
Statistics and Probability	N/A	N/A	N/A	11/2/2009 at 11:00:00 PM

Question Details:

Suppose that you give the NAEP test to an SRS of 1000 people from a large population in which the scores have mean 280 and standard deviation σ = 60. The mean x of the 1000 scores will vary if you take repeated samples.

According to the 68–95–99.7 rule, about 95% of all the values of x fall within the margin of error (denotedm) of the mean μ. What is m?

A.	3.795
B.	0.120
C.	0.489
D.	5.692
E.	1.897

Tags: Statistics, Margin of error, Statistics and Probability, Statistics and Probability, m, 68–95–99.7 rule

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