
Results Description
Lower Lower bound for μ
Upper Upper bound for μ
Two-Sample T-Interval
Menu name
T-Int: μ
1
– μ
2
This option uses the Student’s t-distribution to calculate a condence interval for the dierence between the
means of two populations, μ
1
– μ
2
, when the population standard deviations, σ
1
and σ
2
, are unknown.
Inputs
The inputs are as follows:
Field name Description
ẋ
1
Sample 1 mean
ẋ
2
Sample 2 mean
s
1
Sample 1 standard deviation
s
2
Sample 2 standard deviation
n
1
Sample 1 size
n
2
Sample 2 size
C Condence level
Pooled Whether or not to pool the samples based on their standard deviations
Results
The results are as follows:
Results Description
C Condence level
DF Degrees of freedom
Critical T Critical values for T
Lower Lower bound for Δμ
Upper Upper bound for Δμ
Condence intervals 283
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