Question 24 (5 points] A clinical trial was conducted to compare weight-loss programs. Three popular weight loss programs and a control group were included. The weight loss programs were 1)|ow-calorie diet; 2) low-fat diet; 3) low-carbohydrate diet. The control group was told that they were participating in a study of healthy behaviors. Fifty (50] women were randomized to each group (total of 200 women]. The primary outcome was weight loss after the 8-week intervention period (defined as weight measured at the end of the study minus weight measured at the start of the study]. The investigators were interested in determining whether a difference existed among the four groups. 0 Two sample t-test O Wilcoxon Rank Sum test 0 One-way ANOVA O Paired t-test Question 25 (5 points] The CDC physical activity guidelines recommend at least 150 minutes a week of moderate-intensity aerobic physical activity for adults. A sample of 75 adults in a study of cardiovascular risk factors reported engaging in moderate-intensity aerobic physical activity 120 minutes a week with a standard deviation of 60 minutes. Based on the sample data, is the physical activity significantly less than recommended? 0 Wilcoxon Signed Rank test 0 One sample t-test O One-way ANOVA O Paired t-test Question 26 [5 points] A study was designed to assess risk factors for obesity. Children were enrolled and received a complete physical examination. The children were classified as normal weight (BMI 25). The investigators were interested in whether there was a significant difference in the percentage of children with normal weight versus overweight/obese by sex. 0 Two sample t-test O Chi-Square test 0 Paired t-test