Q: What is the underlying principle of a chi square test?

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The Chi-squared statistic can be used to test for association.

The Chi-square test is a statistical test that is usually used to test how well a data set fits some hypothesised distribution.

square

A F-ratio test compares 2 variances and tell if they are significantly different. A Chi-square test compares count data.

yes it is

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The chi-square test is pronounced "keye-skwair" test.

A Chi-square table is used in a Chi-square test in statistics. A Chi-square test is used to compare observed data with the expected hypothetical data.

The Chi-square test is a statistical test that is usually used to test how well a data set fits some hypothesised distribution.

The Chi-squared statistic can be used to test for association.

square

A F-ratio test compares 2 variances and tell if they are significantly different. A Chi-square test compares count data.

Yes.

yes it is

no

Yes. It is a statistical test.

A chi-square statistic which is near zero suggests that the observations are exceptionally consistent with the hypothesis.

you do the observed-expected value and square it, then devide that by the expected you do this for each cell then you add them up also you can enter your data as a matrix on a calculator TI and go to stat, test, chi square test.