What is the shape of the sampling distribution of p1 - p2


Question: 1. What is the shape of the sampling distribution of p1^ - p2^ for two large samples? What are the mean and standard deviation of this sampling distribution?

2. When are the samples considered large enough for the sampling distribution of the difference between two sample proportions to be (approximately) normal?

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Basic Statistics: What is the shape of the sampling distribution of p1 - p2
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