HP 39gII

116 Inference app
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:
Critical Z Critical values for Z.
Lower Lower bound for π.
Upper Upper bound for π.
Result Description
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