A Pilot Study Reveals a Wide Variation in Measurement Values

A pilot study reveals a wide variation in measurement values among subjects with an overall mean value that is higher than among the general population.By increasing the sample size in a subsequent study,the researcher expects to

A) decrease the variation of scores among subjects.
B) increase the variation of scores among subjects.
C) decrease the mean value of scores among subjects.
D) increase the mean value of scores among subjects.

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