Manual

240 Inference app
Symbolic view options
The table below summarizes the options available in
Symbolic view for the two inference methods: hypothesis
test and confidence interval.
If you choose one of the hypothesis tests, you can choose
an 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 conduct a Z-Test on one mean on
the example data to illustrate how the app works.
Hypothesis Test Confidence Interval
Z-Test: 1 , the Z-
Test on one mean
Z-Int: 1 , the confidence
interval for one mean, based
on the Normal distribution
Z-Test: 
1
– 
2
, the
Z-Test on the
difference between
two means
Z-Int: 
1
– 
2
, the confidence
interval for the difference
between two means, based on
the Normal distribution
Z-Test: 1 , the Z-
Test on one
proportion
Z-Int: 1 , the confidence
interval for one proportion,
based on the Normal
distribution
Z-Test: 
1
– 
2
, the
Z-Test on the
difference between
two proportions
Z-Int: 
1
– 
2
, the confidence
interval for the difference
between two proportions,
based on the Normal
distribution
T-Test: 1 , the T-
Test on one mean
T-Int: 1 , the confidence
interval for one mean, based
on the Student’s t-distribution
T-Test: 
1
– 
2
, the
T-Test on the
difference between
two means
T-Int: 
1
– 
2
, the confidence
interval for the difference
between two means, based on
the Student’s t-distribution