MA 220
E. Lee
Exercise 1-1
Show all your work to get credit. Box your answer.
1. A brochure inviting subscription for a new diet program states that the participants
are expected to lose over 22 pounds in five weeks. Suppose that, from the data of the
five-week weight losses of 56 participants, the sample mean and standard deviation are
found to be 23.5 and 10.2 pounds, respectively. Could the statement in the brochure be
substantiated on the basis of these findings?
(a) Test with α=.05.
(b) Calculate the p−value and interpret the result.
