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
