Multiple Choice
A researcher uses a repeated-measures design to compare individuals' performance before treatment with their performance after treatment.If all of the participants show improved performance of 8 or 9 points after treatment,then the researcher should find ____.
A) a sample mean difference near zero
B) a t statistic near zero
C) the variance of the difference scores is near zero
D) a very large variance in the difference scores
Correct Answer:
Verified
Correct Answer:
Verified
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