891. In an experiment the researcher manipulates the ________ variable and measure the ________ variable.
A. independent, dependent
B. dependent, independent
C. causal, spurious
D. spurious, causal

892. The more exercise a person takes the fewer medical problems they report. This is an example of:
A. a curvilinear relationship
B. statistical independence
C. a positive correlation
D. a negative correlation

893. In a normal distribution most scores are located:
A. at the high end of the distribution
B. at the low end of the distribution
C. in the centre of the distribution
D. at the extremes of the distribution

894. Data from a correlational study is usually shown as a:
A. scatterplot
B. pie chart
C. bar graph
D. b or c

895. A researcher plans to assess intelligence by counting the number of times participants can hop on one leg in 60 seconds. An obvious problem with this is:
A. lack of statistical validity
B. number of hops is too subjective
C. lack of construct validity
D. lack of significance

896. A double-blind study is used to minimize the impact of:
A. experimenter bias
B. expectancy effects
C. both a and b
D. neither a nor b

897. Correlation coefficients range from:
A. r = -1 to r = +1
B. r = 0 to r = +1
C. r = -1 to r = 0
D. r = +.5 to r = +1

898. In an experiment randomly assigned, participants drank wine or water. All participants then completed an anxiety questionnaire. In this experiment the IV was:
A. the results of the memory test
B. the participants
C. the random assignment
D. what the participants drank

899. Research shows that the older a person is, the larger their vocabulary. This is an example of a :
A. positive correlation
B. negative correlation
C. causal correlation
D. partial correlation

900. Three commonly used measures of central tendency are:
A. range, standard deviation, median,
B. median, mode, dispersion
C. mode, median, standard deviation
D. median, mode, mean

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