Texas Instruments TI-83 Guide Book

Inferential Statistics and Distributions 13-21
8313INFE.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:47 PM Printed: 02/19/01 1:38 PM
Page 21 of 36
2
.
PropZInt (two-proportion
z
confidence interval; item B)
computes a confidence interval for the difference between
the proportion of successes in two populations (p
1
N
p
2
). 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
). The computed confidence interval depends on
the user-specified confidence level.
Input:
,
Calculated results:
2-PropZInt

Texas Instruments TI-83 Specifications

General

Programming	TI-BASIC
Processor	Zilog Z80, 6 MHz
Weight	7.4 oz (210 g)
Display	96x64 pixels, monochrome LCD
Power Source	4 AAA batteries, 1 CR1616 or CR1620 for backup
Memory	32 KB RAM
Connectivity	2.5mm I/O port for linking with other TI calculators