Inference app 113
Results The results are:
Confidence intervals
The confidence interval calculations that the HP 39gII can
perform are based on the Normal Z-distribution or
Student’s t-distribution.
One-Sample Z-Interval
Menu name Z-int: 1 μ
This option uses the Normal Z-distribution to calculate a
confidence interval for μ, the true mean of a population,
when the true population standard deviation, σ, is
known.
Pooled Check this option to pool samples
based on their standard deviations.
Field
name
Definition
Result Description
Test T T-Test statistic.
Test
Difference in the means associated
with the test t-value.
P Probability associated with the T-Test
statistic.
DF Degrees of freedom.
Critical T Boundary values of T associated with
the α level that you supplied.
Critical Difference in the means associated
with the α level you supplied.
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