Question
In: Statistics and Probability
Are low-fat diets or low-carb diets more effective for weight loss? A sample of 70 subjects...
Are low-fat diets or low-carb diets more effective for weight loss? A sample of 70 subjects went on a low-carb At the end of that time, the sample mean weight loss was 10.5 pounds with a sample standard deviation of 7.09 pounds. A second sample of 76 went on a low-fat diet. Their sample mean weight loss was 18.0 with a standard deviation of 7.26. Can you conclude that their was no difference in the mean weight loss between the two diets? Use a = .05 level.
Be sure to show all 5 steps of the Hypothesis test.
Evaluate using a P-Value hypothesis test, Explain why you chose your decision.
Solutions
Expert Solution
TOPIC:Two-sample t-test for the population means.
Here,we assume that the population sd's are equal for both the populations.
orchestra answered 10 months agoRelated Solutions
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The technology output below shows results of a significance test
for testing
Upper H 0 : mu equals...
In a study, 272 moderately obese subjects were randomly assigned to one of three diets: low-fat,...
In a study, 272 moderately obese subjects were randomly
assigned to one of three diets: low-fat, restricted-calorie;
Mediterranean, restricted-calorie; or low-carbohydrate,
nonrestricted-calorie. The prediction was that subjects on a
low-carbohydrate diet would lose weight, on the average. After
two years, the mean weight loss was 5.5 kg for the 109 subjects in
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The technology output below shows results of a significance test
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Upper H 0 : mu equals...
A doctor wishes to determine which of two diets is more effective in reducing weight. A...
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Select any 3 specific (give the name) weight-loss diets and
compare them in relation
to:
a) What claims do they make?
b) What principle/s are they based on?
c) What are the risks each one poses?
d) Do they include an exercise component/
e) Which, if any, have the best chance of working? Why or why
not?
f) Submit your results and your response to this activity for
extra credit.
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answer the following.
Whataretheappropriatehypothesestotestwhetherthereisevidenceforadifferencein
mean weight...
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Low-fat diet: 7,6,8,8,6 low Calorie diet: 7,7,5,4,5 high exercise:
7,8,7,9,8
a) Test the null hypothesis that the extent of weight reduction
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(10 points) b)...
3. A health researcher was interested in comparing three methods of weight loss: low-calorie diet, low-fat...
3. A health researcher was interested in comparing three methods
of weight loss: low-calorie diet, low-fat diet, and high-exercise
regimen. He selected 15 moderately overnight subjects and randomly
assigned 5 to each weight-loss program. The following weight
reductions (in pounds) were observed after a one-month period:
______________________________
Low
Low-fat
High
Calorie diet
diet
exercise
______________________________
7
7
7
7
6
8
5
8
7
4
8
9
5
6
8
_____________________________
a) Test the null hypothesis that the
extent of...
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