Question

A researcher would like to determine if relaxation training will affect the number of headaches for...

A researcher would like to determine if relaxation training will affect the number of headaches for chronic headache sufferers. For a week prior to training, each participant records the number of headaches suffered. Participants then receive relaxation training, and for the week following training the number of headaches is again measured. The number of headaches before and after training are provided in the table.

a.

Compute the appropriate mean and SS. (2 points each)

b.

Do the results indicate a significant difference? Use a two-tailed test with a = .05. Include the null hypothesis in symbols, critical region(s), and a conclusion about significance. (8 points)

c.

Compute Cohen’s d and r2 and state the size of each effect. (2 points each)

Before

After

7

2

3

2

7

3

4

1

11

5

13

5

6

6

7

8

11

10
Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A researcher would like to determine if relaxation training will affect the number of headaches for...
A researcher would like to determine if relaxation training will affect the number of headaches for chronic headache sufferers. For a week prior to training, each participant records the number of headaches suffered. Participants then receive relaxation training and for the week following training the number of headaches is again measured. Use SPSS to run a paired t-test and show all the steps involved in hypothesis testing as shown in the sample solution. Copy paste the SPSS output (the output...
A researcher would like to determine if relaxation training will affect the number of headaches for...
A researcher would like to determine if relaxation training will affect the number of headaches for chronic headache sufferers. For a week prior to training, each participant records the number of headaches suffered. Participants then receive relaxation training and for the week following training the number of headaches is again measured. Do the results indicate a significant difference? Use SPSS to run a paired t-test and show all the steps involved in hypothesis testing. Please attach your response as a...
A researcher is interested in brain training services like Luminosity affects the speed with which people...
A researcher is interested in brain training services like Luminosity affects the speed with which people can solve puzzles. To test this, she has research participants complete brain training exercises daily, and measures the speed with which they solve a puzzle at four different times: before practice, after 1 week of training, after 2 weeks of training, and after 3 weeks of training. Eight subjects participate in the experiment; each subject receives every level of the IV. Their data (time...
Application Exercise: A team of researchers recruited a random sample of migraine sufferers. Before the study...
Application Exercise: A team of researchers recruited a random sample of migraine sufferers. Before the study began at baseline, participants were asked to record the duration of headaches they experienced in a week. A few days later, all participants were asked to practice a week-long relaxation technique designed to reduce migraine headaches. A two-week off period in which the participants practiced nothing was given between the relaxation technique. Throughout the relaxation technique participants were asked to record the duration of...
A sports psychologist wants to know if weight training leads to more positive mood. To assess...
A sports psychologist wants to know if weight training leads to more positive mood. To assess the effects of weight training on mood, she obtained a sample of 10 people who had never weight trained and measured their mood. She then instructed them in proper weight training techniques and had them follow a training program for one month. At the end of the month the participants’ mood was measured again. The mood scale was scored such that higher numbers indicate...
Data: Participant Prior to Weight Training After Weight Training D (after—prior) 1 5 7 2 4...
Data: Participant Prior to Weight Training After Weight Training D (after—prior) 1 5 7 2 4 6 3 3 6 4 2 1 5 5 6 6 6 7 7 7 7 8 6 5 9 2 4 10 6 6 3. A sports psychologist wants to know if weight training leads to more positive mood. To assess the effects of weight training on mood, she obtained a sample of 10 people who had never weight trained and measured their...
3. A therapist would like to determine if acknowledging positive statements and ignoring negative statements that...
3. A therapist would like to determine if acknowledging positive statements and ignoring negative statements that a patient makes will have an effect of future statements. Before treatment, the therapist interviews patients and records the number of positive remarks made. During the next session, the therapist uses her therapy. Then during the session after the treatment, the therapist records the number of positive statements. The data are as follows... Before After 4 6 3 8 5 8 2 7 Conduct...
A clinic specializing in eating disorders would like to evaluate the effectiveness of a nutritional training...
A clinic specializing in eating disorders would like to evaluate the effectiveness of a nutritional training program on binge eating disorder (BED). A psychologist was hired to conduct a small study to examine the potential effect of nutritional training on number of binges per month. The psychologist recruited 10 patients in the clinic to participate in a nutritional training program and 12 patients in the clinic with similar demographics who do not participate in the nutritional program. Afterward, all participants...
A researcher is interested to learn if there is a linear relationship between the hours in...
A researcher is interested to learn if there is a linear relationship between the hours in a week spent exercising and a person’s life satisfaction. The researchers collected the following data from a random sample, which included the number of hours spent exercising in a week and a ranking of life satisfaction from 1 to 10 ( 1 being the lowest and 10 the highest). Participant Hours of Exercise Life Satisfaction 1 3 1 2 14 2 3 14 4...
A researcher wanted to learn whether the number of alcoholic beverages consumed per week was associated...
A researcher wanted to learn whether the number of alcoholic beverages consumed per week was associated with scores on a health attitude scale. So the researcher gathered 10 random people. Participants were asked how many drinks they have per week, and to complete a health attitudes scale (1-10). High scores on the scale reflect positive attitudes to health and low scores reflect poor attitudes to health. Using the data below, an alpha of .05 (two-tailed), use a Pearson correlation to...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT