Texas Instruments TI-83 PLUS - Manual (Page 411)

TI-83 Plus Inferential Statistics and Distributions 408
Calculated results:
2 . SampTInt
2 . SampTInt (two-sample t confidence interval; item 0 ) 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
unknown. The computed confidence interval depends on the user-
specified 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}