Confidence Intervals for the Difference of Two Proportions

AP Statistics· difficulty 4/5

Conditions for two-sample z procedure for difference of proportions

A
$Random samples (or random assignment), independent, large counts in each sample$
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B
$Just same n in each$
C
$Only large counts$
D
$Only random sampling$

Explanation

Random/independent samples; np̂ \geq 10 and n(1-p̂) \geq 10 in each.

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