Aaron is five years old. What does the U.S. Department of Health and Human Services consider the greatest threat to his health?

Participants want to feel sure that their responses will note be shared with anyone outside of the immediate research group and that the results will not identify them by name. This refers to _____

a. informed consent b. debriefing c. confidentiality d. deception

As long as data are ordinal, interval, or ratio, they should be summarized using

a. a measure of central tendency. b. a measure of variability. c. a measure of central tendency and variability. d. nominal information.