Example 8 described a study about various therapies for teenage
Example 8 described a study about various therapies for teenage girls suffering from anorexia. For each of 17 girls who received the family therapy, the changes in weight were
11, 11, 6, 9, 14, -3, 0, 7, 22, -5, -4, 13, 13, 9, 4, 6, 11.
a. Plot these data with a dot plot or box plot, and summarize.
b. Verify that the weight changes have x = 7.29, s = 7.18, and se = 1.74 pounds.
c. Give all steps of a significance test about whether the population mean was 0, against an alternative designed to see if there is any effect.
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