inte m calle.. Using Pooled Sample proportion is denoted by & and it combines the two sample propertions inte ane proportion, as shown here: p = x + X n+nz 1- p Test stadistics for two proportions (with Ho: P = p) (P- P) - (P-P) Z Pa P9 + n, nz where P = Pz = 0 where P = (assumed in the null hypothesis) X + X2 / pocked sample purpurbon) + 9 = 1 - p Atnz Confidence interval Estimate of P = p = 0 the confidence interval estimate of the difference 1 P PL is - E < (P = p) < (P, + P) + E (^-^)-EL Margin of Error Pr -7 E = Z PLI + n nz la