SOLVED

31)Random assignment of participants in experiments generally A)ensures equality of the groups on all variables except the independent variable. B)does not enable confident interpretations of findings. C)produces confounding variables that cannot easily be identified. D)produces participant bias effects. 32)Participant attrition in a study on self-esteem in male sociopaths versus normal males would affect generalizability because A)the participants who dropped out may be different in some critical way than those who remained in the study. B)it would call into question the diagnostic category of sociopathy. C)there would not be a large enough sample size. D)the results could only be generalized to the population of male sociopaths and not to all males. 33)The statistical test(s) most often used for comparing two groups is (are) the A)X-test. B)t-test and ANOVA. C)Mann-Whitney U-test. D)chi-square. 34)Nonparametric statistical tests are typically used for A)score data. B)ratio data. C)ordinal data. D)internal data. 35)An analysis of variance (ANOVA) is used A)when random sampling is not possible. B)to compare the means of two or more groups. C)when the dependent measures yield nominal data. D)when the experimental and control group do not vary. 36)In analyzing data in differential research, if we have score data and more than two groups, we would typically use A)a Mann-Whitney U-Test. B)an analysis of variance (ANOVA). C)a chi-square test. D)a correlated t-test. 37)In analyzing data from two groups in differential research, we would use ________ if the data are ordinal. A)an analysis of variance (ANOVA) B)parametric tests C)a Mann-Whitney U-Test D)a t-test for independent groups 38)The null hypothesis in differential research is  A)that the sample means are unequal. B)that the sample means are equal. C)that the population means are unequal. D)that the population means are equal. 39)When one population mean is different from another in differential research you must ________ the null hypothesis. A)reject B)accept C)rewrite D)supplement 40)Confounding variables are A)a rare occurrence in differential research. B)common but negligible in differential research. C)are not reported when describing the research study D)must be measured and reported when describing the research study. Â