HP 40gs User Manual page 128

hp40g+.book Page 2 Friday, December 9, 2005 1:03 AM
Inference aplet's SYMB view keys
11-2
The table below summarizes the options available in
Symbolic view.
Hypothesis Confidence Intervals
Tests
Z: 1 μ, the Z-Test Z-Int: 1 μ, the confidence
on 1 mean interval for 1 mean, based on
the Normal distribution
Z: μ – μ Z-Int: μ
, the
1 2
Z-Test on the interval for the difference of
difference of two two means, based on the
means Normal distribution
Z: 1 π, the Z-Test Z-Int: 1 π, the confidence
on 1 proportion interval for 1 proportion,
based on the Normal
distribution
Z: π1 – π2, the Z-Int: π1 – π2, the confidence
Z-Test on the interval for the difference of
difference in two two proportions, based on the
proportions Normal distribution
T: 1 μ, the T-Test on T-Int: 1 μ, the confidence
1 mean interval for 1 mean, based on
the Student's t-distribution
T: μ – μ T-Int: μ
, the T-
1 2
Test on the interval for the difference of
difference of two two means, based on the
means Student's t-distribution
If you choose one of the hypothesis tests, you can choose
the alternative hypothesis to test against the null
hypothesis. For each test, there are three possible choices
for an alternative hypothesis based on a quantitative
comparison of two quantities. The null hypothesis is
always that the two quantities are equal.Thus, the
alternative hypotheses cover the various cases for the two
quantities being unequal: <, >, and ≠.
In this section, we will use the example data for the Z-Test
on 1 mean to illustrate how the aplet works and what
features the various views present.
– μ
, the confidence
1 2
– μ
, the confidence
1 2
Inference aplet