# What Other Items Do You Think Need to Be Included in Dr. Zak’s Domain Sampling?

Satisfactory Essays
Due Day 7: 4/1/13: Dr. Zak Case Study

This is a team assignment, so make sure every participant’s name is on the assignment. Please have one member post in the “Assignments” link.
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Dr. Zak Case Study
Instructions
Read the following case study. Then, use the information in the case study to answer the accompanying follow-up questions. Although questions 1-2 have short answers, you should prepare a 150 to 200-word response to each of the remaining questions.
Case Study
Dr. Zak developed a test to measure depression. He sampled 100 university students to take his five item test. The group of students was comprised of 30 men and 70 women. In this group, four persons were African American, six persons were Hispanic, and one person was Asian. Zak’s Miraculous Test of Depression is printed below: 1. I feel depressed: Yes No 2. I have been sad for the last two weeks: Yes No 3. I have seen changes in my eating and sleeping: Yes No 4. I don’t feel that life is going to get better: Yes No 5. I feel happy most of the day: Yes No Yes = 1; No = 0 The mean on this test is 3.5 with a standard deviation of .5.
Follow-Up Questions
1. Sally scores 1.5 on this test. How many standard deviations is Sally from the mean? (Show your calculations and answer in a complete sentence.)

2. Billy scores 5. What is his standard score? (Show your calculations and answer in a complete sentence.)

3. What scale of measurement is Dr. Zak using? Do you think Dr. Zak’s choice of scaling is appropriate? Why or why not? What are your suggestions?

4. Do you think Dr. Zak has a good sample on which to norm

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