Question 1The difference between a research question and a research hypotheses is that a hypotheses make a prediction about what will happen and a question does not make a prediction.TrueFalse1 points Question 2You want a representative sample of all the people insured by a large insurance company. How would probability sampling achieve a representative sample of this population?Probability sampling would survey everyone.Probability sampling would survey every person at one of the organizations insured by the company.Probability sampling would survey a convenience sample of people employed by the company.Probability sampling would survey a random sample of everyone insured by the company.1 points Question 3Which statement best describes external validity?External validity deals with whether the results from a study generalize.External validity deals with whether the measures used in a study are appropriate.1 points Question 4Ethnographic research is an example of qualitative researchTrueFalse1 points Question 5In some studies, the independent variable can be considered as the cause and the dependent variable as the effect.TrueFalse1 points Question 6Which of the following procedures would control extraneous variables?Hold the variables constant across all comparison groups.Use a large convenience sample.1 points Question 7Controlling extraneous variables in a study is necessary because those variables may prevent the researcher from drawing correct cause and effect conclusions.TrueFalse1 points Question 8A non-normal rating scale (such as a Likert-type scale) is a ratio measure.True False1 points Question 9Which of the following techniques is the best way to test for validity?Assess the inter-rater agreementPerform a test-retest analysisCheck the inter-item consistencyCorrelate the measure with other measures of the same construct1 points Question 10Which of the following two techniques is a test of reliability?Assess the inter-rater agreementTest if an instrument predict future performance1 points Question 11Which of the two designs would best protect against threats to internal validity?Soloman Four-Group DesignOne Shot Case Study Design1 points Question 12Which of the following research approaches is both repeatable and allows for causal inferencesCase studiesCorrelational studiesDescriptive studiesExperimental studies1 points Question 13To demonstrate predictive validity of a job selection test, you want to show that there is NO correlation between the test and the future job performance of the employees.TrueFalse1 points Question 14Construct validity of a performance ratings can be demonstrated whenThere is no correlation between the ratings and other indicators of performanceThere are only positive correlations between the ratings and other indicators of performanceThere are only negative correlations between the ratings and other indicators of performanceThere are both positive and negative correlations between the ratings and other indicators of performance1 points Question 15The distribution of scores on a final exam shows that most of the students scored very high, but there are quite a few with pretty low scores. A frequency distribution will probably show that the data arePositively skewedNegatively skewed1 points Question 16Which of the following will increase the power of a statistical test?Increase you sample sizeDecrease your sample size1 points Question 17When comparing two groups, the hypothesis that there is no difference between the groups is called the ____________ hypothesis.AlternativeNullResearchExperimental1 points Question 18A correlation (Pearson r) between a standardized test and Freshman grades is r = .80. This r shows a ___________ relationship between the two variables.DirectInverseNegativeSpurious1 points Question 19In a study to test the relationship between class size and learning effectiveness, which statistical test would be most appropriate?t-testANOVAPearson rZ-test1 points Question 20As part of an investigation of online learning, the researcher measures student satisfaction with chat rooms compared to discussion boards. The comparison between the chat rooms and discussion boards should be tested using which statistic?t-testMultivariate RPearson rZ-test