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 30% of the teen girls smoke to stay thin? The alternative hypothesis is: