# Statistics

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A study found that 82% of elementary students buy lunch at school at least once a month. How large a sample would be necessary to estimate the true proportion within four percentage points with 95% confidence

• Statistics -

n = (z/2 )^2 * pq/E^2
n = (1.96)^2 *0.82*0.18/0.04^2
n = ?

• Statistics -

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