STAT 200 Final Exam (FALL 2016) STAT 200 Final Exam 2016 | Page 3

(a) A study of 10 different weight loss programs involved 500 subjects. Each of the 10
programs
had 50 subjects in it. The subjects were followed for 12 months. Weight change for each
subject was recorded. You want to test the claim that the mean weight loss is the same for
the
10 programs. What statistical approach should be used?
(i) t-test
(ii) linear regression
(iii) ANOVA
(iv) confidence interval
(b) A STAT 200 instructor teaches two classes. She wants to test if the variances of the
score
distribution for the two classes are different. What type of hypothesis test should she use?
(i) t-test for two independent samples
(ii) t-test for matched samples
(iii) z-test for two samples
(iv) F- test
4. The frequency distribution below shows the distribution for IQ scores for a random sample
of