Hello! To test for significant differences in proportions among the C, T1, and T2 groups: Use a chi-squared test for independence. Calculate expected frequencies, chi-squared statistic, and degrees of freedom. Compare chi-squared statistic with critical value at chosen significance level. Larger sample sizes increase test power but don't guarantee meaningful differences. Interpret SAS output by examining chi-squared statistic, degrees of freedom, and p-value. If p-value < chosen significance level, there's a significant difference between groups. Use PROC FREQ or PROC LOGISTIC in SAS for analysis.
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