The chi-square test is a statistical hypothesis test that is used to compare observed and expected counts in a contingency table. Its uses include: tests for independence, tests for homogeneity, and ...

This is a preview. Log in through your library . The Journal of Educational Measurement (JEM) is a quarterly journal that publishes original measurement research, reports on new measurement ...

It is shown that certain conditional distributions, obtained by conditioning on a sufficient statistic, can be used to transform a set of random variables into a smaller set of random variables that ...