One factor that needs to be considered in determining the number of subjects to include in a norm sample is that the sample needs to be large enough to
A) ?calculate means and standard deviations.
B) ?increase the sizes of interpolations and extrapolations.
C) ?make it likely that infrequent elements in the population will be represented.
D) ?include at least 25 subjects at each grade and at each age.
C
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Two weeks ago, Roger replaced his bad habit of eating a candy bar every afternoon at work with eating a healthy snack. However, today was a particularly stressful day at work, and he relapsed and ate a candy bar. He is ready to give up, but you suggest he begin doing which of the following instead?
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