Confidence Intervals; One-Sample Z-Interval - HP NW280-200X User Manual

Results

Confidence intervals

One-Sample Z-Interval

Menu name
Inputs
Inference app
Field Definition
name
Check this option to pool samples
Pooled
based on their standard deviations
The results are:
Result Description
Test T T-Test statistic
Test Difference in the means associated
 x
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  level that you supplied
Critical Difference in the means associated
with the level you supplied
 x
The confidence interval calculations that the HP Prime can
perform are based on the Normal Z-distribution or
Student's t-distribution.
Z-Int: 
This option uses the Normal Z-distribution to calculate a
confidence interval for , the true mean of a population,
when the true population standard deviation, , is known.
The inputs are:
Field Definition
name
Sample mean
x
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