What does a correlation coefficient do?
a. It allows us to draw conclusions about whether one variable causes another variable.
b. It creates a correlational design, rather than an experimental design.
c. It simplifies a complex pattern involving many scores into one easily interpreted statistic.
d. It summarizes the X scores and the Y scores separately.
c
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Otto complains of excruciatingly painful headaches that are centered near one eye. His eye tears, and his nose is blocked when the headache occurs. From what kind of headache is Otto probably suffering?
a. cluster b. common migraine c. classic migraine d. tension
Regarding dieting and weight loss, which of the following statements is FALSE?
a. People who diet intensely every other day lose as much as those who diet moderately every day. b. It is best to restrict eating to one room and do not read, watch TV, study or talk on the phone while eating. c. It is generally better to eat three large meals a day than several small ones because more calories are burned. d. No diet can succeed for long without an increase in exercise.