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Using the Formula $n = \frac{1}{ME^2}$ to Determine Sample Size
When we want 95% confidence and use the conservative estimate of $p = 0.5$, we can use the simple formula $n = \frac{1}{ME^2}$ to roughly
determine the sample size needed for a given margin of error ME. Use this formula to determine the sample size needed for a margin of
error of 0.005.
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n =