# Suppose that scores on the mathematics part of the National Assessment of Educational Progress (NAEP) test for eighth-grade students follow a Normal distribution with standard deviation = 110. You want to estimate the mean score within + and - 10 with 90% confidence. How large an SRS of scores must you choose? Give your answer as a whole number.N=

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Suppose that scores on the mathematics part of the National Assessment of Educational Progress (NAEP) test for eighth-grade students follow a Normal distribution with standard deviation = 110. You want to estimate the mean score within + and - 10 with 90% confidence. How large an SRS of scores must you choose? Give your answer as a whole number.

N=

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Step 1

It is given that margin of error (E) is 10, standard deviation is 110 and the confidence level is 90%.

Step 2

Here,

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