A Researcher Uses a Repeated-Measures Design to Compare Individuals' Performance

question 65

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)None of the other options is correct.

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