Texas Instruments TI-83 Guide Book

13-18 Inferential Statistics and Distributions
8313INFE.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:47 PM Printed: 02/19/01 1:38 PM
Page 18 of 36
2
.
SampZInt (two-sample
z
confidence interval; item 9)
computes a confidence interval for the difference between
two population means (
m
1
Nm
2
) when both population
standard deviations (
s
1
and
s
2
) are known. The computed
confidence interval depends on the user-specified
confidence level.
In the example:
LISTC={154 109 137 115 140}
LISTD={108 115 126 92 146}
Data Stats
Input:
,,
Calculated results:
2-SampZInt

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