Texas Instruments TI-83 Manual Book page 253

2-PropZTest
Input:
Calculated results:
Drawn results:
(two-proportion z test; item
2.PropZTest
to compare the proportion of successes (p
two populations. It takes as input the count of successes in
each sample (x and x
1
each sample (n
1
hypothesis H : p
0
Ç) against one of the alternatives below.
ƒp
H : p (
p1:ƒp2
a 1 2
H : p <p (
p1:<p2
a 1 2
H : p >p (
p1:>p2
a 1 2
,
,
Inferential Statistics and Distributions 13-15
) and the count of observations in
2
and n ).
2.PropZTest
2
=p (using the pooled sample proportion
1 2
)
)
)
) computes a test
6
and p ) from
1 2
tests the null