Unformatted text preview: lung cancer. 3. For a group of high school students, the association between time spent on homework and GPA was r = .6. For a group of college students, the correlation was r = .7. For each statement below, say whether it is true or false : If I combine all of the students into one group, then the correlation. .. a. will be between .6 and .7. b. will be more than .7. c. will be positive. d. could take almost any value  it could even be negative. e. could not possibly be equal to 1.0. 4. Give an example of an association that is the result of a lurking variable. Identify the explanatory and response variables in your example. Explain how the lurking variable produces the association....
View
Full Document
 Spring '08
 Staff
 Statistics, Probability, Tobacco smoking, lung cancer deaths, b. Doll, c. Doll

Click to edit the document details