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