Two-Sample T-Interval - HP NW280-200X User Manual

Inputs
Results

Two-Sample T-Interval

Menu name
Inputs
Inference app
for the case in which the true population standard
deviation, , is unknown.
The inputs are:
Field Definition
name
Sample mean
x
Sample standard deviation
s
Sample size
n
Confidence level
C
The results are:
Result Description
C Confidence level
DF Degrees of freedom
Critical T Critical values for T
Lower Lower bound for 
Upper Upper bound for 
T-Int:  – 
1 2
This option uses the Student's t-distribution to calculate a
confidence interval for the difference between the means
of two populations, 
standard deviations, 
The inputs are:
Result Definition
Sample 1 mean
x
1
Sample 2 mean
x
2
–  , when the population
1 2
and  , are unknown.
1 2
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