HP Prime Graphing Wireless Calculator - Manual (Page 90)

86 Inference app
Results The results are:
Two-Proportion Z-Interval
Menu name Z-Int: π
1
– π
2
This option uses the Normal Z-distribution to calculate a
confidence interval for the difference between the
proportions of successes in two populations.
Inputs The inputs are:
Results The results are:
Result Description
C Confidence level
Critical Z Critical values for Z
Lower Lower bound for π
Upper Upper bound for π
Field
name
Definition
Sample 1 success count
Sample 2 success count
n
1
Sample 1 size
n
2
Sample 2 size
C Confidence level
x
1
x
2
Result Description
C
Confidence level
Critical Z Critical values for Z
Lower Lower bound for π
Upper Upper bound for π
Δ
Δ