HP Prime Graphing Calculator - Manual (Page 256)

252 Inference app
Inputs The inputs are:
Results The results are:
One-Proportion Z-Interval
Menu name Z-Int: 1
This option uses the Normal Z-distribution to calculate a
confidence interval for the proportion of successes in a
population for the case in which a sample of size n has a
number of successes x.
Inputs The inputs are:
Field
name
Definition
Sample 1 mean
Sample 2 mean
n
1
Sample 1 size
n
2
Sample 2 size

1
Population 1 standard deviation

2
Population 2 standard deviation
C Confidence level
x
1
x
2
Result Description
C
Confidence level
Critical Z Critical values for Z
Lower Lower bound for 
Upper Upper bound for 


Field
name
Definition
x Sample success count
n Sample size
C Confidence level