Texas Instruments TI-84 PLUS - Graphing Calculator User Manual

Chapter 13: Inferential Statistics and Distributions 228
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
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:

Texas Instruments TI-84 PLUS - Graphing Calculator Specifications

General

Type	Graphing Calculator
Display Type	LCD
Screen Resolution	96 x 64 pixels
Processor	Zilog Z80
Memory	24 KB RAM, 480 KB Flash ROM
Power Source	4 AAA batteries (with backup lithium battery)
Connectivity	I/O port
Weight	7.4 oz (210 g)
Software	TI-OS (Texas Instruments Operating System)