Chapter 9, Problem 104H

Over the past few decades, public health officials have examined the link between weight concerns and teen girls smoking. Researchers surveyed a group of 273 randomly selected teen girls living In Massachusetts (between 12 and 15 years old). After four years the girls were surveyed again. Sixty-three said they smoked to stay thin. Is there good evidence that more than thirty percent of the teen girls smoke to stay thin?

After conducting the test, your decision and conclusion are

a. Reject H0: There Is sufficient evidence to conclude that more than 30% of teen girls smoke to stay thin.

b. Do no reject H0: There is not sufficient evidence to conclude that less than 30% of teen girls smoke to stay thii.

c. Do not teject H0: Thete Is not sufficient evidence to conclude that more than 30°c of teen girls smoke to stay thin.

d. Reject H0: There is sufficient evidence to conclude that less than 30% of teen girls smoke to stay thin.