Measurement and MethodologyStatistical Procedures (GRE (Graduate Record Examinations) Psychology): Questions 12  15 of 21
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Question number: 12
» Measurement and Methodology » Statistical Procedures
Question
Which of the following statistical tests should the researcher use to analyze her data?
A researcher wants to consider the effects of preparation on standardized test scores. She plans to compare the GRE scores of students who did and did not take a preparation course for the GRE. She also plans to compare the GRE scores of students who took preparation courses though Company X, Company Y, and Company Z.
Choices
Choice (5)  Response  

a.  Ttest 

b.  Chisquare test 

c.  2 x 2 x 2 factor analysis 

d.  Person’s r correlation coefficient 

e.  2 x 3 factor analysis 

Question number: 13
» Measurement and Methodology » Statistical Procedures
Question
Which of the following best describes the graph above?
Choices
Choice (5)  Response  

a.  Normal distribution 

b.  Negatively skewed distribution 

c.  Frequency polygon 

d.  Positively skewed distribution 

e.  Histogram 

Question number: 14
» Measurement and Methodology » Statistical Procedures
Question
Which of the following is NOT true of the Chi Square statistic?
Choices
Choice (5)  Response  

a.  It makes no assumptions about population parameters. 

b.  It is a parametric test. 

c.  It is based on expected frequencies. 

d.  It does not assume that the variance between two groups is equal. 

e.  It should be used with nominal data. 

Question number: 15
» Measurement and Methodology » Statistical Procedures
Question
The members of a sample who deviate from the mean by a standard deviation expressed as a Zscore of 3 represent
Choices
Choice (5)  Response  

a.  the most frequent third of the sample 

b.  members of the sample who are most likely to appear six times more frequently than other members of the sample 

c.  outliers 

d.  the most frequent twothirds of the sample 

e.  members of the sample who are most likely to appear three times more frequently than other members of the sample 
