The technique was introduced in 1900 by Kearl Pearson.
Among the uses of chi-square are the following:
- To test the goodness of fit to a normal curve; that is, to find out whether or not a sample distribution conforms with the hypothetical normal distribution.
- To find out whether or not an observed proportion is equal to some given ideal or expected proportion.
- To test the independence of one variable from another variable.
By: Andrea Beatrice Pechueco
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