Question

In a study of the effectiveness of a certain diet, 100 subjects went on the diet for a period of six months. The sample mean weight loss was 0.5 pound, with a sample standard deviation of 4 pounds.Can you conclude that the diet produces a mean weight loss that is greater than 0? Use the α = 0.05 level of significance.Perform the hypothesis test, make sure you follow each step and show all your work.

Answer #1

In a recent medical study, 81 subjects were placed on a low-fat
diet. After 12 months, their sample mean weight loss was 2.2
kilograms, with a sample standard deviation of 6.1 kilograms.
Construct an appropriate test to conclude if the mean weight loss
is greater than 0 at an α = 0.01 significance level.

Are low-fat diets or low-carb diets more effective for weight
loss? A sample of 70 subjects went on a low-carbohydrate diet for
six months. 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 subjects 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...

Are low-fat diets or low-carb diets more effective for weight
loss? A sample of 46 subjects went on a low-carbohydrate diet for
six months. At the end of that time, the sample mean weight loss
was 4.6 kilograms with a sample standard deviation of 6.28
kilograms. A second sample of 49 subjects went on a low-fat diet.
Their sample mean weight loss was 2.3 kilograms with a standard
deviation of 4.66 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 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...

Here we study the effectiveness of two dieting methods. Method 1
is a diet high in protein, fiber, and fat but low in carbohydrates.
Method 2 is a diet low in fat but high in fiber and carbohydrates.
After one year, a sample of participants from each diet method were
checked for the amount of weight lost. The 99% confidence intervals
for the mean weight loss of each plan are given below.
Method 1: 8.61 < μ
< 9.59
Method 2: 6.19...

are low fat diets or low carb diets more effective for weight
loss? a sample of 70 subjects went on a low carbohydrate diet for 6
months. a 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 subjects went on a low fat diet. their sawith a
sample mean weight loss was 18.0 with a standard deviation of 7.26.
test the claim that...

Ten people went on a diet for a month. The weight losses
experienced (in pounds) are given below. The negative weight loss
is a weight gain. Test the hypothesis that the mean weight loss was
more than 0, using a significance level of 0.05. Assume the
population distribution is Normal. 3, 7, 10, 0, 3, 7, 5, 5,
1, and negative 3

A study was conducted to determine the effectiveness of a diet
program in reducing weight of obeys people. Eight randomly selected
patients were put on this diet and the amount of weight losses (in
pounds) were recorded. Suppose the sample mean and the sample
standard deviation of weight losses were 38 and 4.598136 pounds,
respectively. Construct a 90% confidence interval for the average
weight loss and based on the confidence interval constructed
determine if you would expect to see an...

A study was conducted to determine the effectiveness of a diet
program in reducing weight of obeys people. Eight randomly selected
patients were put on this diet and the amount of weight losses (in
pounds) were recorded. Suppose the sample mean and the sample
standard deviation of weight losses were 36 and 5.291503 pounds,
respectively. Construct a 90% confidence interval for the average
weight loss and based on the confidence interval constructed
determine if you would expect to see an...

Q.1. ) Low-carbohydrate diet A study plans to have a sample of
obese adults follow a proposed low-carbohydrate diet for three
months. The diet imposes limited eating of starches (such as bread
and pasta) and sweets, but otherwise no limit on calorie intake.
Consider the hypothesis, The population mean of the values of
weight change (= weight at start of study - weight at end of study)
is a positive number.
• a. Is this a null or an alternative...

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