exam2b-answerkey

exam2b-answerkey - PSC 41 Fall 2007 Exam 2 - FORM B Name...

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1 PSC 41 – Fall 2007 Name Exam 2 - FORM B ID# Instructions: There are 45 multiple-choice questions. Read each question and the possible answer choices carefully . Choose the single BEST response for each item. Fill in the appropriate bubble on your UCD2000 scantron answer sheet with a No.2 pencil. 1. A study of 50 college students was conducted in a small northern California town. Researchers were interested in the alcohol dinking habits of college Juniors. Students were asked to report the number of shots of alcohol they typically consumed on a party-Thursday night out. Below is a summary of the data. What type of data summary is this? a. Frequency Polygon b. Frequency Plot c. Frequency Histogram d. Frequency Summary Report 2. Using the graph in number 1, the mode for the number of shots for females is: a. 1 b. 2 c. 3 d. 4 3. Using the graph in number 1, the total number of subjects that typically consumed 3 shots of alcohol was a. 7 b. 8 c. 9 d. 10 4. Sampling error represents a. a mistake on the part of the researcher. b. the error among different samples due to errors by the researcher. c. the expected variation among different samples due to chance. 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 8 Number of Shots Frequency Males Females
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2 d. a lack of validity in the study due to design problems. 5. The beta ( β ) level is the expected probability of a. measurement error. b. a Type I error. c. a Type II error. d. sampling error. 6. Which of the following is NOT a requirement to use the t-test for independent groups? a. two samples of participants b. participants are exposed to one level of the independent variable c. having two or more independent variables d. participants are not matched 7. To obtain the variance, which = ( Σ (x - x) 2 /(N-1), the a. sum of squared deviations is divided by the degrees of freedom. b. sum of squared deviations is divided by the number of scores. c. standard deviation is divided by the degrees of freedom. d. standard deviation is divided by the number of scores. 8. If you wish to know whether the results of your experiment are likely to have been obtained by chance, you should use a. inferential statistics. b. descriptive statistics. c. random number tables. d. the mean. 9. Which level of constraint allows us to draw causal inferences with confidence? a. differential b. naturalistic c case-study d. experimental 10. When participants are aware of being observed, researchers should be concerned with a. obtrusiveness. b. unobtrusiveness.
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exam2b-answerkey - PSC 41 Fall 2007 Exam 2 - FORM B Name...

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