Difference between revisions of "ChiSquaredTest Command"
From GeoGebra Manual
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{{command|statistics}} | {{command|statistics}} | ||
;ChiSquaredTest[ <Matrix of Observed Counts> ] | ;ChiSquaredTest[ <Matrix of Observed Counts> ] | ||
− | :Performs a Chi | + | :Performs a [[w:Chi-squared_test| Chi-squared test]] that compares the given matrix of observed counts against the matrix of expected counts determined by the hypothesis of independence. |
:The matrix of expected counts is calculated internally. Each expected count is found from the row and column totals of the given matrix of observed counts using the rule: | :The matrix of expected counts is calculated internally. Each expected count is found from the row and column totals of the given matrix of observed counts using the rule: | ||
− | ::expected count = | + | :: <math> \text{expected count} = \frac{\text{row total} × \text{column total}}{\text{total observed counts}} </math> |
:Results are returned in list form as {Probabilty value, Chi Squared test statistic}. | :Results are returned in list form as {Probabilty value, Chi Squared test statistic}. | ||
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;ChiSquaredTest[ <Matrix of Observed Counts>, <Matrix of Expected Counts> ] | ;ChiSquaredTest[ <Matrix of Observed Counts>, <Matrix of Expected Counts> ] | ||
− | :Performs a Chi | + | :Performs a [[w:Chi-squared_test| Chi-squared test]] that compares the given matrix of observed counts against the given matrix of expected counts. |
:Results are returned in list form as {Probabilty value, Chi Squared test statistic}. | :Results are returned in list form as {Probabilty value, Chi Squared test statistic}. |
Revision as of 19:46, 2 September 2012
This page is about a feature that is supported only in GeoGebra 4.2. |
- ChiSquaredTest[ <Matrix of Observed Counts> ]
- Performs a Chi-squared test that compares the given matrix of observed counts against the matrix of expected counts determined by the hypothesis of independence.
- The matrix of expected counts is calculated internally. Each expected count is found from the row and column totals of the given matrix of observed counts using the rule:
- \text{expected count} = \frac{\text{row total} × \text{column total}}{\text{total observed counts}}
- Results are returned in list form as {Probabilty value, Chi Squared test statistic}.
- ChiSquaredTest[ <List of Observed Counts>, <List of Expected Counts> ]
- Performs a Goodness of Fit test that compares the given list of observed counts against the given list of expected counts.
- Results are returned in list form as {Probabilty value, Chi Squared test statistic}.
- ChiSquaredTest[ <Matrix of Observed Counts>, <Matrix of Expected Counts> ]
- Performs a Chi-squared test that compares the given matrix of observed counts against the given matrix of expected counts.
- Results are returned in list form as {Probabilty value, Chi Squared test statistic}.