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 1 year agoRelated Solutions
Low-fat or low-carb? Are low-fat diets more effective for weight loss? A sample of 58 subjects...
Low-fat or low-carb? Are low-fat diets more
effective for weight loss? A sample of
58
subjects went on a low-carbohydrate diet for six months. At the
end of that time, the sample mean weight loss was
3.2
kilograms with a sample standard deviation of
5.42
kilograms. A second sample of
60
subjects went on a low-fat diet. Their sample mean weight loss
was
2.4
kilograms with a standard deviation of
4.48
kilograms. Can you conclude that the mean weight loss...
Low-fat or low-carb? Are low-fat diets or low-carb diets more effective for weight loss? A sample...
Low-fat or low-carb? Are low-fat diets or low-carb diets more
effective for
weight loss? A sample of 77 subjects went on a low-carbohydrate
diet for six
months. At the end of that time, the sample mean weight loss was
4.7 kilograms
with a sample standard deviation of 7.16 kilograms. A second sample
of 79
subjects went on a low-fat diet. Their sample mean weight loss was
2.6 kilograms
with a standard deviation of 5.90 kilograms. Can you conclude that
the...
Are low-fat diets or low-carb diets more effective for weight loss? A simple random sample of...
Are low-fat diets or low-carb diets more effective for weight
loss? A simple random sample of 85 adults went on a
low-carbohydrate diet for 6 months. At the end of that time, the
average weight loss was 4.8 kilograms with a standard deviation
6.04 kilograms. A second simple random sample of 77 adults went on
a low-fat diet. Their average weightloss was 4 kilograms with a
standard deviation of 5.08 kilograms. Can you conclude that the
true mean weightloss differs...
Low carb diets are believed to have positive effects for weight loss, increased performance, management of...
Low carb diets are believed to have positive effects for weight
loss, increased performance, management of diabetes, and even
curing cancer. In the JAMA article, low carb is compared to low fat
diets in a 12 month trial. Discuss the effectiveness of low carb
diets in relation to:
1) Weight changes between a healthy low-fat diet vs a
healthy low-carbohydrate diet
2) Genotype pattern and baseline insulin secretion associated
with the dietary effects on weight loss
3) Which diet was better...
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
the low-carbohydrate group with a standard deviation of 7.0 kg.
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
the low-carbohydrate group with a standard deviation of 7.0 kg.
The technology output below shows results of a significance test
for testing
Upper H 0 : mu equals...
A doctor wishes to determine which of two diets is more effective in reducing weight. A...
A doctor wishes to determine which of two diets is more
effective in reducing weight. A sample of 20 obese adults who are
interested in losing weight is randomly divided into groups of 10.
After 6 weeks the weight loss of each participant was recorded. The
mean for diet 1 is 8 pounds with a standard deviation of 3.23
pounds. The mean for diet 2 is 11 pounds with a standard deviation
of 6.78 pounds. Does the data justify the...
6. Analyze and compare weight-loss diets Select any 3 specific (give the name) weight-loss diets and...
6. Analyze and compare weight-loss diets
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.
A new low fat/carbohydrate diet was designed to assist with weight loss. From a population of...
A new low fat/carbohydrate diet was designed to assist with
weight loss. From a population of obese people, 100 are randomly
selected to go on the new diet, while another 100 are selected to
eat a diet of a similar quantity of food but not as low in fats and
carbohydrates. The weight loss of each of the 200 people are in the
Excel file "Extra HW 1 Diet Study". Use 0.05 significance and
answer the following.
Whataretheappropriatehypothesestotestwhetherthereisevidenceforadifferencein
mean weight...
A health researcher was interested in comparing three methods of weight loss: low-calorie diet, low-fat diet,...
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-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
does not differ by type of weight-loss program. (Set α=.01 level)
(10 points) b)...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Task 3: Research Project (5 marks) You’re investigating a case involving a 2 GB drive that...
- 2. Do you agree with Nietzsche’s claim that “every elevation of the type ‘man’ has hitherto...
- Question: The function predictAnswer should be made based on the following. Your answer must be able...
- A 2.5 mm -diameter sphere is charged to -4.5 nC . An electron fired directly at...
- On June 30, 2017, Wisconsin, Inc., issued $158,250 in debt and 19,400 new shares of its...
- The Ivanhoe Department of Transportation has issued 25-year bonds that make semiannual coupon payments at a...
- Task 1: Investigating Hashing software and the basic usage (total 9 marks) In this task, you...
ADVERTISEMENT