The next step in the multiple comparison procedure is to compute a critical value for each pairwise comparison, The critical value for the if pairwise difference for k populations follows where 10,2 is the chi- square value with level of signicance o and k 1 degrees of freedom for k populations, 5,- and E] are the sample proportions for populations i and j, and n,- and n] are the sample sizes from populations i and 1'. CV], = 712 You Fi) + 5,0 i'v,> J The value for 1'12 will be used for all comparisons. Note that a will represent the upper tail area or the chi- square distribution. The desired level of signicance was given to be 0.05, so a = . There are three populations being oompared, glvlng k = Population 1 had 144 Yes responses and 105 No responses. Therefore, HI = 144 + 105 = population 2 had 144 Yes responses and 156 No responses. Therefore, n2 = 144 + 156 = Population 3 had 90 Yes responses and 110 No responses Therefore, n3 = 90 + 110 =