According to Table 2 in the article, the 135 subjects in the nutrition counseling group had a baseline mean of 3.67 and standard deviation of 2.00 for the number of portions per day they ate of fruits and vegetables. Over the 12 months of the study, the mean increased by 0.99. Report the 95% confidence interval for the change in the mean and interpret.

Medical research makes frequent use of statistical methods shown in this chapter. At British Medical Journal (BMJ) bmj.
com on the Internet, pull up the April 19, 2003, issue. Browse through the article titled “Behavioural counseling to increase consumption of fruit and vegetables in low income adults:
randomized trial” by A. Steptoe et al. You will see a variety of statistical analyses used.

Report the corresponding results for the behavioral counseling group. Were the groups in this analysis independent or dependent samples?