the expected frequency for each class equals the total sample size divided by the number of classes, Under the null hypothesis (of equal proportions, specified frequencies, or specified proportions), ...

The chi-square value is calculated using the following formula: Using this formula, the difference between the observed and expected frequencies is calculated for each experimental outcome category.

namely that the test statistic is based on the observed minus expected frequencies in each cell, and that this follows a chi-squared distribution with (rows-1)*(columns-1) degrees of freedom under the ...

Request relative risk measures for 2×2 tables RELRISK Request risks and risk differences for 2×2 tables RISKDIFF Specify the type of row and column scores SCORES= Specify expected frequencies for a ...