Inputs, Results, Two-sampie t-interva – HP 39g Graphing Calculator User Manual
Page 137: Menu name
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Two-Sampie T-Interva!
Menu name
T-INT: |il -jx2
This option uses the Student’s t-distribution to calculate a
confidence interval for the difference between the means of
two populations, pj - P
2
> when the population standard
deviations, Ojand Gj, are unknown.
Inputs
The inputs are:
Field name
Definition
11
Sample 1 mean.
X 2
Sample 2 mean.
sl
Sample 1 standard deviation.
s
2
Sample 2 standard deviation.
nl
Sample 1 size.
n
2
Sample 2 size.
c
Confidence level.
„Pooled
Whether or not to pool the samples based
on their standard deviations.
Results
The results are:
Result
Description
Critical T
Critical value for T.
ApMin
Lower bound for P| - P
2
.
A p Max
Upper bound for P| -- P
2
-
Inference aplet
9-21