Question

In a test of the effectiveness of garlic for lowering cholesterol,

81

subjects were treated with raw garlic. Cholesterol levels were measured before and after the treatment. The changes (before minus after) in their levels of LDL cholesterol (in mg/dL) have a mean of

0.3

and a standard deviation of

15.1

Use a

0.01

significance level to test the claim that with garlic treatment, the mean change in LDL cholesterol is greater than

00.

What do the results suggest about the effectiveness of the garlic treatment? Assume that a simple random sample has been selected. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim.

Answer #1

In a test of the effectiveness of garlic for lowering
cholesterol, 36 subjects were treated with raw garlic. Cholesterol
levels were measured before and after the treatment. The changes
(before minus after) in their levels of LDL cholesterol (in
mg/dL) have a mean of 0.3 and a standard deviation of 2.11. Use a
0.01 significance level to test the claim that with garlic
treatment, the mean change in LDL cholesterol is greater than 0.
What do the results suggest about...

In a test of the effectiveness of garlic for lowering
cholesterol,
36
subjects were treated with raw garlic. Cholesterol levels were
measured before and after the treatment. The changes (before
minus after) in their levels of LDL cholesterol (in mg/dL) have a
mean of
0.4
and a standard deviation of
24.6.
Use a
0.05
significance level to test the claim that with garlic
treatment, the mean change in LDL cholesterol is greater than
00.
What do the results suggest about...

In a test of the effectiveness of garlic for lowering
cholesterol, 64 subjects were treated with raw garlic. Cholesterol
levels were measured before and after the treatment. The changes
(before minus after) in their levels of LDL cholesterol (in
mg/dL) have a mean of 0.3 and a standard deviation of 24.6 Use a
0.10 significance level to test the claim that with garlic
treatment, the mean change in LDL cholesterol is greater than
0.
What do the results suggest about...

in a test of the effectiveness of garlic for lowering
cholesterol, 50 subjects were treated with garlic in a process
tablet form. cholesterol levels were measured before and after the
treatment. the changes( before - after) in their levels of LDL
cholesterol (in mg/dL) have a mean of 5.6 and a standard deviation
of 18.1. Construct a 95% confidence interval estimate of the mean
net change in LDL cholesterol after the garlic treatment. what does
the confidence interval suggest about...

In a test of the effectiveness of garlic for lowering
cholesterol, 47 subjects were treated with garlic in a processed
tablet form. Cholesterol levels were measured before and after the
treatment. The changes (before minus −after) in their levels of
LDL cholesterol (in mg/dL) have a mean of 2.8 and a standard
deviation of 18.4. Construct a 95% confidence interval estimate of
the mean net change in LDL cholesterol after the garlic treatment.
What does the confidence interval suggest about...

In a test of the effectiveness of garlic for lowering
cholesterol, 50 subjects were treated with garlic in a processed
tablet form. Cholesterol levels were measured before and after the
treatment. The changes (beforeminus− after) in their levels of LDL
cholesterol (in mg/dL) have a mean of 4.1and a standard deviation
of 16.3 Construct a 99 % confidence interval estimate of the mean
net change in LDL cholesterol after the garlic treatment. What does
the confidence interval suggest about the...

In a test of the effectiveness of garlic for lowering
cholesterol, 43 subjects were treated with garlic in a processed
tablet form. Cholesterol levels were measured before and after the
treatment. The changes (beforeminusafter) in their levels of LDL
cholesterol (in mg/dL) have a mean of 3.6 and a standard deviation
of 16.7. Construct a 90% confidence interval estimate of the mean
net change in LDL cholesterol after the garlic treatment. What does
the confidence interval suggest about the effectiveness...

In a test of the effectiveness of garlic for lowering
cholesterol, 43 subjects were treated with garlic in a processed
tablet form. Cholesterol levels were measured before and after the
treatment. The changes (beforeminusafter) in their levels of LDL
cholesterol (in mg/dL) have a mean of 3.8 and a standard deviation
of 18.5. Construct a 99% confidence interval estimate of the mean
net change in LDL cholesterol after the garlic treatment. What does
the confidence interval suggest about the effectiveness...

In a test of the effectiveness of garlic for lowering
cholesterol, 4747 subjects were treated with garlic in a processed
tablet form. Cholesterol levels were measured before and after the
treatment. The changes (beforeminus−after) in their levels of LDL
cholesterol (in mg/dL) have a mean of 5.3 and a standard deviation
of 19.7. Construct a 95% confidence interval estimate of the mean
net change in LDL cholesterol after the garlic treatment. What does
the confidence interval suggest about the effectiveness...

In a test of the effectiveness of garlic for lowering
cholesterol, 50 subjects were treated with garlic in a processed
tablet form. Cholesterol levels were measured before and after the
treatment. The changes (beforeminusafter) in their levels of LDL
cholesterol (in mg/dL) have a mean of 4.8 and a standard deviation
of 19.6. Construct a 99% confidence interval estimate of the mean
net change in LDL cholesterol after the garlic treatment. What does
the confidence interval suggest about the effectiveness...

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