User's Manual

Inference app 239
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Inference app
The Inference app enables you to calculate confidence
intervals and undertake hypothesis tests based on the
Normal Z-distribution or Student’s t-distribution. In
addition to the Inference app, the Math menu has a full set
of probability functions based on various distributions
(Chi-Square, F, Binomial, Poisson, etc.).
Based on statistics from one or two samples, you can test
hypotheses and find confidence intervals for the following
quantities:
• mean
• proportion
• difference between two means
• difference between two proportions
Sample data The Inference app comes with sample data (which you
can always restore by resetting the app). This sample data
is useful in helping you gain an understanding of the app.
Getting started with the Inference app
Let’s conduct a Z-Test on one mean using the sample data.
Open the
Inference
app
1. Open the Inference app:
I
Select
Inference
The Inference app
opens in Symbolic
view.