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Determine the sample size needed to construct a 90​% confidence interval to estimate the average GPA...

Determine the sample size needed to construct a 90​% confidence interval to estimate the average GPA for the student population at a college with a margin of error equal to 0.5. Assume the standard deviation of the GPA for the student population is 3.0. The sample size needed is ?

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Determine the sample size needed to construct a 90​% confidence interval to estimate the average GPA for the student population at a college with a margin of error equal to 0.5.

Assume the standard deviation of the GPA for the student population is 3.0. The sample size needed is ?

The sample size need to construct 90%

confidence internal to estimate average GAP margin of error equal to 0.5

Squaring on both sides

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