Additional Information and Full Hypothesis Test Examples · Exercise 44

For each of the word problems, use a solution sheet to do the hypothesis test. The solution sheet is found in. Please feel free to make copies of the solution sheets. For the online version of the book, it is suggested that you copy the.doc or the.pdf files.

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?
After conducting the test, your decision and conclusion are

(a) Reject H_0: There is sufficient evidence to conclude that more than 30% of teen girls smoke to stay thin.
(b) Do not reject H_0: There is not sufficient evidence to conclude that less than 30% of teen girls smoke to stay thin.
(c) Do not reject H_0: There is not sufficient evidence to conclude that more than 30% of teen girls smoke to stay thin.
(d) Reject H_0: There is sufficient evidence to conclude that less than 30% of teen girls smoke to stay thin.

OpenStax, Introductory Statistics 2e · §9.5 Additional Information and Full Hypothesis Test Examples · Exercise 44