Texas Instruments TI-82 STATS Manual Book page 256

STAT TESTS Menu
(continued)
(two-sample z confidence interval; item )
2.SampZInt
2.SampZInt 9
computes a confidence interval for the difference between two
population means (m ) when both population standard
Nm
1 2
deviations ( and ) are known. The computed confidence
s s
1 2
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:
13–18 Inferential Statistics and Distributions