
Chi-square tests
An HP Prime calculator can perform tests on categorical data based on the chi-square distribution.
Specically, HP Prime calculators support both goodness of t tests and tests on two-way tables.
Goodness of t test
Menu name
Goodness of Fit
This option uses the chi-square distribution to test the goodness of t of categorical data on observed counts
against either expected probabilities or expected counts. In the Symbolic view, make your selection in the
Expected box: choose either Probability (the default) or Count.
Inputs
With Expected Probability selected, the Numeric view inputs are as follows:
Field name Description
ObsList The list of observed count data
ProbList The list of expected probabilities
Results
When is tapped, the results are as follows:
Results Description
x
2
The value of the chi-square test statistic
P The probability associated with the chi-square value
DF The degrees of freedom
Menu keys
The menu key options are as follows:
Menu key Description
Opens a menu that enables you to select multiple cells to copy and paste.
Displays the default test results, as listed previously.
Displays the expected counts.
Displays the list of contributions of each category to the chi-square value.
Returns to the Numeric view.
284 Chapter 13 Inference app
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