Inferential Statistics and Distributions 13-19
8313INFE.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:47 PM Printed: 02/19/01 1:38 PM
Page 19 of 36
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}
Data Stats
Input:
,,
Calculated results:
2-SampTInt
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