Two-sample t-interval, Inputs, Results – HP 49g Graphing Calculator User Manual
Page 186
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Two-Sample T-Interval
Menu name:
T-INT: |il - |i2
This option uses the Student’s t-distribution to calculate a confidence
interval for the difference in the means of two populations, pj - ¡ij, when
tire population standard deviations, ajand O
2, are imknown.
Inputs
X
1
x2
si
s2
nl
n2
C
^Pooled
Results
Critical
T
^ p Min
zli p Max
Sample 1 mean.
Sample 2 mean.
Sample 1 standard deviation.
Sample 2 standard deviation.
Sample 1 size.
Sample 2 size.
Confidence level.
Whether or not to pool the samples based on their
standard deviations.
Critical value for T.
Lower boimd for pj - P
2.
Upper bound for pj - p
2.
Page 9-18
Using statistics
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