Texas Instruments TI-84 PLUS - Graphing Calculator Manual Book page 235

2-PropZTest
(two-proportion
2-PropZTest
(p and p ) from two populations. It takes as input the count of successes in each sample (
1 2
) and the count of observations in each sample (
x
2
(using the pooled sample proportion Ç) against one of the alternatives below.
H : p =p
0 1 2
• H : p (
p1: p2
ƒp ƒ
a 1 2
• H : p <p ( )
p1:<p2
a 1 2
• H : p >p ( )
p1:>p2
a 1 2
Input:
Calculated
results:
Drawn
results:
test; item ) computes a test to compare the proportion of successes
z 6
)
Chapter 13: Inferential Statistics and Distributions
and ).
n n 2-PropZTest
1 2
and
x
1
tests the null hypothesis
228