chi2class

  CHI2CLASS - Tests whether observations are distributed equally among classes

    [P,CHI2,E] = CHI2CLASS(D)

    Returns the p value and chi-square value of the test of the null
    hypothesis that cells are distributed equally among classes in several
    groups.  E is the expected number of members of each group if there
    are no differences among the experimental groups.

    D should be the grouping matrix.  Each row of D should have the
    class memberships for an experimental group.

    Example:  Suppose we want to examine whether the gender distribution
    of computer science majors differs from that of English majors in a 
    small college.  Suppose that there are 90 male and 10 female computer
    science majors and 40 male and 60 female English majors.

    D = [ 90 10 ; 40 60 ];
    [p,chi2,E] = chi2class(D)