HP Prime Graphing Wireless Calculator Manuel d'utilisateur Page 329

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One-Proportion Z-Interval
Menu name
Z-Int: 1 π
This option uses the Normal Z-distribution to calculate a condence 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 as follows:
Field name Description
x Sample success count
n Sample size
C Condence level
Results
The results are as follows:
Result Description
C Condence level
Critical Z Critical values for Z
Lower Lower bound for π
Upper Upper bound for π
Two-Proportion Z-Interval
Menu name
Z-Int: π
1
– π
2
This option uses the Normal Z-distribution to calculate a condence interval for the dierence between the
proportions of successes in two populations.
Inputs
The inputs are as follows:
Field name
Description
x
1
Sample 1 success count
x
2
Sample 2 success count
n
1
Sample 1 size
Condence intervals 281
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