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RIGHT CLICK ON THE IMAGE AND SELECT "OPEN IMAGE IN A NEW TAB" FOR A LARGER CLEARER IMAGE. Determine the sample size required to estimate the mean score on a standardized test within 2 points of the true mean with 95

math Statistics-And-Probability

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Answer 1

Answer #1

$n=\left [ \frac{Z*\sigma}{E} \right ]^{2}= \left[\frac{ 1.96 * 17 }{ 2 }\right]^{2}= 277.56 \approx278$

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