PSY 326 Week 4 Quiz

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1. In order for a sample to be representative, it needs to be ______________________ to/ as the population you are interested in studying

2. Dr. Ahmed is interested in conducting a survey of patients living with HIV.  She does not have access to a full nationwide sample so she randomly selects four cities across the country, Atlanta (Southeastern US), Boston (Northeastern US), St. Louis (Midwestern US) and Seattle (Western US).  She then randomly selects HIV clinics within these cities, and randomly samples patients treated at these clinics.  What type of sampling method has Dr. Ahmed used?

3. Dr. Stevens is conducting a study of recycling behavior by having students stand at the recycling bins and count the number of people who recycle compared to those who just toss it all in the garbage.  Unfortunately, a reviewer of his research points out that the presence of the students at the recycling bins may have influenced the behavior of people being observed.  Which of the following best describes this problem?

4. When visually presenting values measured on an ordinal, interval, or ratio scale, which of the following should we use?

5. Correlations provide an assessment of the _______________ between two quantitative (also called continuous) variables.

6. Dr. Lee is studying attitudes toward gay and lesbian students. She is concerned that participants will attempt to avoid answering questions by providing a neutral response (neither agreeing nor disagreeing) so she has used a (n) _________________ format, using an even number of points on her scale to avoid this problem.

7. ____________________ is a statistical test used to determine whether two nominal variables are independent or related to one-another

8. __________________is a group of sampling strategies used when each person in a population has a known chance of being in the sample.

9. Dr. Knox is conducting a study in which she is interested in studying patterns of head trauma and depression in college football players.  She surveys football players at State University with odd numbered jerseys about their history of head injury and measures their propensity for depression. Which of the following best describes the sample Dr. Knox has collected?

10. ________________ is a measure of dispersion that represents the average difference between the mean and each individual score which is calculated by taking the square root of the variance