college stats

Suppose population proportion1 = 0.4, sample size1 = 100, population proportion2 = 0.5, sample size2 = 120.

whats the formula? i think this is just a plug and chug

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  1. z = (p1 -p2)/sqrt(p1/n1 + p2/n))

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  2. Post a null hypothesis that would use a t test statistical analysis

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