HP Prime Graphing Wireless Calculator Manuel d'utilisateur Page 328

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Result Description
Lower Lower bound for μ
Upper Upper bound for μ
Two-Sample Z-Interval
Menu name
Z-Int: μ
1
– μ
2
This option uses the Normal Z-distribution to calculate a condence interval for the dierence between the
means of two populations, μ
1
– μ
2
, when the population standard deviations, σ
1
and σ
2
, are known.
Inputs
The inputs are as follows:
Field name Description
1
Sample 1 mean
2
Sample 2 mean
n
1
Sample 1 size
n
2
Sample 2 size
σ
1
Population 1 standard deviation
σ
2
Population 2 standard deviation
C Signicance level
Results
The results are as follows:
Result Description
C Condence level
Critical Z Critical values for Z
Lower Lower bound for Δμ
Upper Upper bound for Δμ
280 Chapter 13 Inference app
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