For the Following Question(s): a School Counselor Claims That He

question 50

Multiple Choice

For the following question(s) : A school counselor claims that he has developed a technique to reduce prestudying procrastination in students. He has students time their procrastination for a week and uses this as a pretest (before) indicator of procrastination. Students then attend a workshop in which they are instructed to do a specific warming-up exercise for studying by focusing on a pleasant activity. For the next week, students again time their procrastination. The counselor then uses the time from this week as the posttest (after) measure.
-A researcher conducts a t test for dependent means with 10 participants. The estimated population variance of the change scores is 20. What is the variance of the distribution of the means of change scores?

• A)20/10 = 2.0
• B)20/9 = 2.2
• C)400/10 = 40.0
• D)400/9 = 44.4

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