Two-Sample Z-Interval - HP 39G User Manual

Two–Sample Z–Interval
Menu name
Inputs
Results
Inference aplet
Z–INT: –
This option uses the Normal Z–distribution to calculate a
confidence interval for the difference between the means of
two populations, – , when the population standard
deviations, and , are known.
1 2
The inputs are:
Field name Definition
Sample 1 mean.
x1
Sample 2 mean.
x2
n1 Sample 1 size.
n2 Sample 2 size.
1 Population 1 standard deviation.
2 Population 2 standard deviation.
C Confidence level.
The results are:
Result Description
Critical Z Critical value for Z.
Lower bound for
Min
Upper bound for
Max
– .
1 2
– .
1 2
9-17