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Inference App
The Inference app provides tools for inferential statistics, enabling you to specify confidence
intervals and test hypotheses. Summary statistics from any column in the Numeric view of the
Statistics 1Var or Statistics 2Var app can be imported into it. To open the Inference app, press
I and select Inference. The app opens in Symbolic view.
Symbolic view This view provides fields for you to define a confidence interval or hypothesis
test. The fields are:
• Method: choose hypothesis test or confidence interval
• Type: choose from a variety of Z- and T-distributions
• Alt Hypoth: choose one of three alternative hypotheses (for hypothesis tests only)
Numeric view Press M to display the Numeric view. This view contains fields for you to
enter sample statistics (e.g. sample mean and sample size n), population parameters (e.g. null
hypothesis mean
0
and standard deviation ), and the significance level . The menu items are:
• : moves the cursor to the entry line where you can add or change a value
• : enables you to import statistics (such as , n, etc.) from any column in the Statistics
1Var or Statistics 2Var app (or any app based on those apps)
• : displays the interval or test results
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