Psychology Test 2 Corrections (Research Methods) - Mason

20. Which of the following is the measure of variation that is most affected by extreme scores?
A. mode
B. range
C. standard deviation
D. mean

31. Theoretically, random assignment should eliminate
A. the need to use statistics
B. the need for a representative sample
C. concerns over validity
D. many confounding variables

33. The __________ is a measure of ___________.
A. correlation coefficient; central tendency
B. median, central tendency
C. mode; variation
D. mean; variation
E. standard deviation, central tendency

35. The procedure designed to ensure that the experimental and control groups do not differ in any way that might affect the experiment’s results is called
A. representative sampling
B. variable controlling
C. stratification
D. random assignment

48. Given a normal distribution of IQ scores with mean score of 100 and standard deviation of 15: your IQ score is 115, what percentile is your IQ score in?
A. 34th
B. 68th
C. 50th
D. 99th
E. 84th

20. B
31. D
33. B
35. D
48. E