Two-Proportion Z-Interval; One-Sample T-Interval - HP NW280-200X User Manual

Two-Proportion Z-Interval

Menu name
Inputs
Results

One-Sample T-Interval

Menu name
232
Result Description
Upper Upper bound for 
Z-Int:  – 
1 2
This option uses the Normal Z-distribution to calculate a
confidence interval for the difference between the
proportions of successes in two populations.
The inputs are:
Field Definition
name
Sample 1 success count
x
1
Sample 2 success count
x
2
Sample 1 size
n
1
Sample 2 size
n
2
Confidence level
C
The results are:
Result Description
C Confidence level
Critical Z Critical values for Z
Lower Lower bound for 
Upper Upper bound for 
T-Int: 1 
This option uses the Student's t-distribution to calculate a
confidence interval for , the true mean of a population,
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Inference app