Note that the Mantel-Haenszel chi-square statistic is appropriate only when both variables lie on an ordinal scale. The other chi-square tests and statistics in this section are appropriate for either ...

Figure 1: Chi-Square Test Demo The p-val ("probability-value") is, loosely speaking, the likelihood that the observed and expected counts agree. So, a small p-value, such as 0.03 (3 percent), ...

Because the CMH statistics in are based on rank scores, the Row Mean Scores Differ statistic is identical to Friedman's chi-square (Q=6.45). The p -value of 0.0917 indicates that differences in skin ...