How is the Chi-square statistic calculated in a goodness of fit test?
- The differences between observed and expected frequencies are averaged
- The differences between observed and expected frequencies are divided by the expected frequencies
- The differences between observed and expected frequencies are squared and summed
- The differences between observed and expected frequencies are squared, summed, and then the square root is taken
In a Chi-square goodness of fit test, the Chi-square statistic is calculated by squaring the differences between observed and expected frequencies, then summing these squared differences.
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