Question: I need help on this problem. I do not know what to do for it or even how to approach it. Nationally, the proportion of

I need help on this problem. I do not know what to do for it or even how to approach it.

Nationally, the proportion of high school graduates who take the SAT is between .3 and .7. How large a sample is necessary to estimate the true proportion of high school graduates who take the SAT within 2.5 percentage points (i.e. 0.025) with 90% confidence?

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