Question: How big do the sample sizes have to be in order to use z style distribution categories to test for proportion difference? EXPLAIN both sample

How big do the sample sizes have to be in order to use z style distribution categories to test for proportion difference? EXPLAIN

  1. both sample sizes must be greater than or equal to 30
  2. n1p1 and n1(1-p1) as well as n2p2 and n2(1-p2) must all be at least 15
  3. n1p1 and n1(1-p1) must be at least 15
  4. only one sample size must be greater than or equal to 30. The other sample size does not.

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