11) Which one of the following is NOT a reason for researchers to suggest that pretest-post test design without a non-equivalent control group is a poor research design?
a) Change in results from pretest to posttest can be explained by regression to the mean
b) Change in results from pretest to posttest can be explained by history effect
c) Change in results from pretest to posttest can be only due to the effect of intervention that researchers applied
d) This design can only be a pilot study design
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Explanation:
In statistics, regression toward the mean (or regression to the mean) is the phenomenon that arises if a sample point of a random variable is extreme (nearly an outlier), a future point will be closer to the mean or average. ... The answer was not 'on average directly above'.
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Answer:
In statistics, regression toward the mean (or regression to the mean) is the phenomenon that arises if a sample point of a random variable is extreme (nearly an outlier), a future point will be closer to the mean or average. ... The answer was not 'on average directly above'.
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