7. Gessner and Healy administered questionnaires to samples of undergraduates. Among other things, the questionnaires contained a scale that measured attitudes toward interpersonal violence (higher scores indicate greater approval of interpersonal violence). Test the results as reported below for sexual differences. Sample 1 (Males) Sample 2 (Females) X1 = 2.99 X2 = 2.29 S1 = 0.88 S2 = 0.91 N1 = 122 N2 = 251\f(X1 - X2) - (*41 - 12) Z (obtained) = OX- X where: (X, - X2) = the difference between the sample means (M1 - uz) = the difference between the population means Oy-y = the standard deviation of the sampling distribution of sample means