Chi-square tests
Some quantities related to categorical variables are approximately Chi-square distributed for large samples. As a consequence, it is possible to devise some important tests whose generic name is "Chi-square tests".
Data Used for Chi-Square Test for the Standard Deviation Example
The following are the data used for the chi-square test for the standard deviation example. The first column is gear diameter and the second column is batch number.
for each predictor the pair of (predictor) categories that is least significantly different with respect to the dependent variable; for classification problems (where the dependent variable is categorical as well), it will compute a Chi-square test ...
We will perform some simple test, called Chi-square test . If the result of the chi-square test shows that, variable Playground is independent from variable Satisfaction, and then we cannot conclude any relation between the two variables.
Chi-square test
Correlation
Factor analysis
Mann-Whitney U
Mean square weighted deviation (MSWD)
Pearson product-moment correlation coefficient
Regression analysis
Spearman's rank correlation coefficient
Student's t-test
Time series analysis ...
 See also: Distribution, Normal distribution, T test, Variance, Data mining
  
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