Texas Instruments TI-84 PLUS - Graphing Calculator Manual Book page 238

2-SampTInt
(two-sample confidence interval; item ) computes a confidence interval for the
2-SampTInt t 0
difference between two population means (m ) when both population standard deviations (s
Nm
1 2 1
and s ) are unknown. The computed confidence interval depends on the user-specified
2
confidence level.
In the example:
SAMP1={12.207, 16.869, 25.05, 22.429, 8.456, 10.589}
SAMP2={11.074, 9.686, 12.064, 9.351, 8.182, 6.642}
Data Stats
Input:
Calculated
results:
Chapter 13: Inferential Statistics and Distributions 231