A researcher measures driving distance from college and weekly cost of gas for a group of commuting college students. What kind of correlation is likely to be obtained for these two variables?
a. A positive correlation c. A correlation near zero
b. A negative correlation d. A correlation near one
A
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Which of the following will not increase the width of a confidence interval?
a. Increase the percentage of confidence from 80% to 90% b. Reduce the sample size from n = 25 to n = 16 c. Increase the sample mean from MD = 2 to MD = 4 d. All of the other options will increase the width of a confidence interval.
Midland Heights High School had three students attempt suicide over the past year, so the school board decided to implement a program to help members of the community recognize the warning signs of suicide. Based on the results from research in this area, you should predict that the program will be most effective if it focuses on training:
a. school officials (teachers, counselors, and coaches) b. students in the senior-level classes c. parents and relatives of the students d. students who are classmates of the three students who attempted suicide
During times of economic hardship, there is an increase in hostility toward illegal immigrants. Psychologists would consider this situation to be an example of
a. scapegoating. b. reaction formation. c. sublimated aggression. d. circumvention.
Hypotheses of the form "I wonder what will happen if" are formulated when:
a. we know a lot about a phenomenon. b. we know little about a phenomenon. c. we reason inductively. d. we know a lot about a phenomenon and we reason inductively.