A Health Psychologist Knows the Smoking Population at the Hospital

Multiple Choice

A health psychologist knows the smoking population at the hospital where she works smokes an average of 18 cigarettes per day with a standard deviation of 7. She plans to conduct a program to reduce smoking. If she has 25 persons in her program, what is the power to detect a real effect of the program such that cigarette consumption is reduced, on the average, by 5 cigarettes? Assume population normality and use a = 0.05 1 tail .

A) Insufficient information
B) 0.9732
C) 0.9463
D) 0.8925