A correlation coefficient will always have a value between

A researcher asks Timmy, a fourth grader, and Thom, a tenth grader, whether it is acceptable to exclude a child from a peer group on the basis of gender. Which of the following responses is the researcher most likely to hear?

A) Thom will say that the exclusion is always unfair. B) Timmy will say that the exclusion is always acceptable. C) Thom will say that the exclusion is acceptable under certain circumstances. D) Timmy will say that the exclusion is acceptable under certain circumstances.

Dr. Z does a study on the connection between physical abuse in childhood and depression in adulthood

Her study has good external validity. This means A) it clearly shows that being physically abused as a child causes a person to become depressed as an adult. B) it was free of error and we can be confident in the results. C) it had a control group and an experimental group. D) its findings can be generalized to people outside the study sample.