A therapist uses behavior therapy to reduce smoking behavior. Studies in other c

Question

A therapist uses behavior therapy to reduce smoking behavior. Studies in other clinics have shown that this therapy does in fact reduce smoking. To evaluate the program in her clinic, she selects five subjects and asks them count the number of cigarettes they smoke per day. She then administers the smoking-reduction program, and then has them again count the number of cigarettes per day. The data are shown below.

Subject

Before

After

1

24

20

2

21

21

3

28

20

4

24

24

5

30

22

Refer to Exhibit 12-1. sD =

the average of the standard deviation of 24, 21, 28, 24, 30 and the standard deviation of 20, 21, 20, 24, 22

none of above

Subject

Before

After

1

24

20

2

21

21

3

28

20

4

24

24

5

30

22

Explanation / Answer

Your question misses one information.. What is sD ? I assume that sD is standard deviation of the differences. In that case iyou have to take difference of the measurements for each person and take the differences. So, NONE OF THE ABOVE will be the answer. Also, if you want to find the general answer,general standard deviation , then also, NONE OF THE ABOVE will be the answer.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.