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.
-Presume the counselor wants to examine whether there is a change (either an increase or decrease)in procrastination after attending his workshop. If the counselor tests 10 students using the .05 level of significance, what cutoff t score(s)will he use? (You should be able to figure this out without a table.)
A)-2.62, 0, +2.62
B)+2.262
C)-2.262, 0
D)-2.262, +2.262

Question

Quizplus · Accepted Answer

Since the counselor is testing whether there is a change in procrastination after attending the workshop, he will use a two-tailed t-test. With a sample size of 10 and a significance level of .05, the cutoff t-score(s) will be +/- 2.262. However, since the alternative hypothesis is two-tailed, there is a possibility of either increase or decrease in procrastination, so we need both the positive and negative cutoff scores, which would be +/- 2.262. Therefore, the correct choice is D.

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