Tests for homoscedasticity among subsamples k within a particular group i (note that the Conover test is a non-parametric test)
residuals for group i
the vector of c(s1i, s2i,..., ski), where s1i+s2i+...+ski=Ti (i.e., the vector divides a particular group i into subsamples)
Calculates chi-squared statistic with a prob
Chi-squared statistic with a prob
Lech Kujawski, Piotr Zientara
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