Texas Instruments TI-83 PLUS - Manual (Page 406)

TI-83 Plus Inferential Statistics and Distributions 403
Calculated results:
,
Drawn results:
2 . PropZTest
2 . PropZTest (two-proportion z test; item 6 ) computes a test to compare
the proportion of successes (p
1
and p
2
) from two populations. It takes as
input the count of successes in each sample ( x
1
and x
2
) and the count of
observations in each sample ( n
1
and n
2
). 2 . PropZTest tests the null
hypothesis H
0
: p
1
=p
2
(using the pooled sample proportion Ç ) against
one of the alternatives below.
•
H
a
: p
1
ƒ p
2
( p1: ƒ p2 )
•
H
a
: p
1
<p
2
( p1:<p2 )
•
H
a
: p
1
>p
2
( p1:>p2 )