1. Which of the following statements describe a correlation?
2. Which of the following statements describe a correlation?
3. Which of the following statements describe a correlation?
4. Which of the following statements describe a correlation?
5. Mark all of the following models that correctly summarize the information in this table. Base your answer only on the content of this table.
| Annual Income (in $) | Sex | |
|---|---|---|
| Male | Female | |
| less than 10,000 | 1 | 2 |
| 10,000 - 30,000 | 2 | 2.5 |
| 30,000 - 80,000 | 3 | 3.5 |
| more than 80,000 | 3 | 3.5 |
6. Mark all of the following statements that correctly summarize the information in this table. Base your answer on only the content of this table.
| Race | Sex | |
|---|---|---|
| Male | Female | |
| Hispanic | 30% | 10% |
| African American | 25% | 20% |
| Asian American | 20% | 12% |
| Caucasian | 22% | 12% |
Statements:
7. The following paragraph describes a correlation between two variables. Of the variables listed below, mark the two which are correlated.
A researcher measures the size of the corpus callosum (a region of the brain) in 27 musicians and 27 non-musicians. The researcher finds that the corpus callosum is roughly 10 to 15% larger in musicians than in non-musicians. All 54 individuals in the study were right-handed males, and all 27 musicians were classical musicians (as opposed to rock or country musicians). The study did not report any differences between the musicians and non-musicians in age or amount of alcohol use.
Variables
8. The following paragraph describes a correlation between two variables. Of the variables listed below, mark the two which are correlated.
A genetically engineered variety of tomato (called Flavr Savr) was recently approved by the Food and Drug Administration. Farmers who grow the Flavr Savr tomato can allow it to ripen longer on the vine than other tomato varieties. This will, it is hoped, provide consumers with a tomato having superior flavor. However, some consumer activists have objected to the sale of the Flavr Savr tomato. The biologists who created the Flavr Savr tomato not only put a gene into it that allows the Flavr Savr tomato to be picked later, but they also put in a second gene which produces an antibiotic. (Antibiotics are widely used to treat diseases such as pneumonia and to prevent accident victims from becoming infected.) The Flavr Savr tomato is the only tomato variety that contains either of these two genes.
Variables9. and 10. Men enrolled at UCLA have an average income of $10,000 per year, and women enrolled at UCLA have an average income of $8,000 per year. On average, UCLA married students are 25 years old. A recent survey obtained information about the income of Black men who graduated from UCLA
9. Does the above passage provide sufficient information to determine that a correlation exists between two variables? (If any correlation at all is indicated, mark "yes." Otherwise, mark "no.")
10. If your answer to the previous question was "no" leave this question blank. If your answer was "yes", mark the two variables which are correlated.
Table of contents Chapter 11. Correlations are hard to interpret