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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

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= 125. You want to

estimate the mean score within10 with 90% confidence. How large an SRS of

scores must you choose?

Give your answer as a whole number.

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