Inferential Statistics and Distributions 13-15
8313INFE.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:47 PM Printed: 02/19/01 1:38 PM
Page 15 of 36
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: p1=p2 (using the pooled sample proportion
Ç) against one of the alternatives below.
• Ha: p1ƒp2 (p1:ƒp2)
• Ha: p1<p2 (p1:<p2)
• Ha: p1>p2 (p1:>p2)
Input:
,
Calculated results:
,
Drawn results:
2-PropZTest