Marguerita conducts a study in which she finds that there is no correlation between the number of calories a person consumes in a day and his or her IQ. The correlation coefficient here would be close to

Recent research on 3- to 5-year-olds has found they are more active on weekdays than weekends

Indicate whether the statement is true or false

Kim likes to play house with her friends. She always wants to be the mother and seems to enjoy telling the "baby" what to do. Kim's play is most likely

A) an outlet for forbidden impulses. B) a reversal of roles. C) an expression of needs. D) imitation of adults.