Diets and Weight Loss ig Before nstruct a lic blood A study

Diets and Weight Loss ig. Before nstruct a lic blood A study in The Journal of the American Medical Association describes control. In the study, 311 Atkins diet, which is based on v to four groups. The first group followed the ollowed the LEARN ation describes the effects of diets on weight women were randomly divided in on very low carbohydrate intake. The second group the Ornish diet, which is based on very high c bohydrate intake. ides, relationships, nutrition) diet, which intake. The third fourth group followed the Zone diet, which is based on low car nutrition) diet, which i is based on low fat and high carbohydrate diet and Each Each group received weekly instruction for two months, and there was a beginning of the study. The mean weight losses of each group after one year follow-up one year from the each group after one year on the diet are shown in the table below. Ornish LEARN 2 79 79 Weight Loss (in pounds) x3.53 Exercises In Exercises 1-4, perform a two-sample z-test to 5. Suppose that in another study,42 people determine whether the mean weight losses of theused an h wo indicated groups are different. For each exercise, write your conclusion as a sentence. Use a 0.05. used an herbal supplement and a high-fiber. low-calorie diet to lose weight. The mean weight loss of this group was 7.05 pounds and the standard deviation was 7.28 pounds. of the u 1. Test the weight losses of people in the Atkins (a) Test the mean weight loss of this group group against those in the LEARN group. 2. Test the weight losses of people in the Ornish with the Atkins group described previously. Use a 0.01. (b) Test the mean weight loss of this group with the Zone group described previously. Use a = 0.01. group against those in the Zone group 3. Test the weight losses of people in the LEARN group against those in the Zone 6. In which comparisons in Exercises 1-5 did you find a difference in weight losses? Write a summary of your findings group 4. Test the weight losses of people in the Atkins group against those in the Ornish group.

Solution

I) Atkins vs learn group

The mean of Group One minus Group Two equals 4.6300
  95% confidence interval of this difference: From -35.0427 to 44.3027


  t = 0.2305
  df = 154
  standard error of difference = 20.082

p = 0.8180

Accept that two means are equal.

2) Ornish vs zone

t = 0.0726
  df = 153
  standard error of difference = 18.194

p = 0.9423

Accept that means are equal for ornish and Zone

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Learn vs zone:

t = 0.1270
  df = 156
  standard error of difference = 17.328

p = 0.8991

Hence accept that both means are equal for zone and learn

4. Atkin vs Ornish

t = 0.2631
  df = 151
  standard error of difference = 20.945

p = 0.7929

Accept that means for Atkin and Ornish are equal.

Group	Group One	Group Two
Mean	10.3600	5.7300
SD	138.5567	111.1024
SEM	15.7900	12.5000
N	77	79