Texas Instruments TI-82 STATS User Manual

Inferential Statistics and Distributions 13–15
8250FC~1.DOC TI-83 international English Bob Fedorisko Revised: 10/26/05 1:39 PM Printed: 10/27/05 2:57
PM Page 15 of 36
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
ƒp
2
(p1:ƒp2)
• H
a
: p
1
<p
2
(p1:<p2)
• H
a
: p
1
>p
2
(p1:>p2)
Input:
,
Calculated results:
,
Drawn results:
2.PropZTest

Texas Instruments TI-82 STATS Specifications

General

Type	Graphing Calculator
Display	LCD
Resolution	96 x 64 pixels
Characters	16 x 8
Processor	Zilog Z80
Programming	TI-BASIC
Memory	28 KB RAM
Power	4 AAA batteries
Connectivity	Link port