Chapter 13: Inferential Statistics and Distributions 350
2-PropZTest
2-PropZTest2-PropZTest
2-PropZTest
2-PropZTest (two-proportion z test; item 6) computes a test to compare the proportion of
successes (p1 and p2) from two populations. It takes as input the count of successes in
each sample (x1 and x2) and the count of observations in each sample (n1 and n2).
2-PropZTest tests the null hypothesis H0:p
1=p2 (using the pooled sample proportion Ç)
against one of the alternatives below.
•H
a: p1ƒp2 (p1:ƒp2)
•H
a: p1<p2 (p1:<p2)
Calculated
results:
Drawn
results: