1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kozerog [31]
2 years ago
13

In a test of the effectiveness of garlic for lowering​ cholesterol, 8181 subjects were treated with raw garlic. Cholesterol leve

ls 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 0.40.4 and a standard deviation of 16.216.2. Use a 0.010.01 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. What are the null and alternative​ hypotheses?
Mathematics
1 answer:
xz_007 [3.2K]2 years ago
3 0

Answer:

With garlic​ treatment, the mean change in LDL cholesterol is not greater than 0.

Step-by-step explanation:

The dependent <em>t</em>-test (also known as the paired <em>t</em>-test or paired samples <em>t</em>-test) compares the two means associated groups to conclude if there is a statistically significant difference amid these two means.

In this case a paired <em>t</em>-test is used to determine the effectiveness of garlic for lowering​ cholesterol.

A random sample of 81 subjects were treated with raw garlic. Cholesterol levels were measured before and after the treatment.

The hypothesis for the test can be defined as follows:

<em>H₀</em>: With garlic​ treatment, the mean change in LDL cholesterol is not greater than 0, i.e. <em>d</em> ≤ 0.

<em>Hₐ</em>: With garlic​ treatment, the mean change in LDL cholesterol is greater than 0, i.e. <em>d</em> > 0.

The information provided is:

\bar d=0.40\\SD_{d}=16.2\\\alpha =0.01

Compute the test statistic value as follows:

t=\frac{\bar d}{SD_{d}/\sqrt{n}}\\\\=\frac{0.40}{16.2/\sqrt{81}}\\\\=0.22

The test statistic value is 0.22.

Decision rule:

If the <em>p</em>-value of the test is less than the significance level then the null hypothesis will be rejected and vice-versa.

Compute the <em>p</em>-value of the test as follows:

p-value=P(t_{n-1}>0.22)\\=P(t_{80}>0.22)\\=0.4132

*Use a <em>t</em>-table.

The <em>p</em>-value of the test is 0.4132.

<em>p-</em>value= 0.4132 > <em>α</em> = 0.01

The null hypothesis was failed to be rejected.

Thus, it can be concluded that with garlic​ treatment, the mean change in LDL cholesterol is not greater than 0.

You might be interested in
A cone is a solid that has one circular base and only one face. true or false
bearhunter [10]
The answer for this is true 
4 0
3 years ago
Read 2 more answers
A radar measures the speed of a car at 45 miles per hour. The actual speed of the car is 40 miles per hour what is the percent e
sweet-ann [11.9K]
Hi☺️ i think it is around the number of less than 2
hope this help !
8 0
2 years ago
I do 10 - 8 for this, right...?
natima [27]
No, you would do 100 - 64 because 10^2 is 100 and 8^2 is 64.
100-64= 36
The square root of 36 is 6. The length of the other leg is 6.
6 0
3 years ago
Solve 3v−8v+7v=24. I need help on this question in math
Lyrx [107]

Answer:

v=12

Step-by-step explanation:

3v-8v+7v=24

3v-v=24

2v=24

v=12

3 0
3 years ago
Robin kept a log of the number of hours she spent birdwatching during September and the cumulative number of birds she observed.
BlackZzzverrR [31]

Answer:

I dont understand there is no equation to solve or any math at all

4 0
3 years ago
Other questions:
  • Multiply 6y(y-21) need help
    11·2 answers
  • Which table shows the greatest ratio of fillers earned to hours worked?
    9·2 answers
  • Find (f/g)(x) f(x)=4x+1 g(x) =3x-4
    14·1 answer
  • Estimate Tim grew 4,799 carrots and nancy grew 3,699 carrots this year. Approximately how many carrots did they grow together?
    7·2 answers
  • Can I Get Help With This:​
    10·1 answer
  • If John has 45 balls and jake has 2 times as much, how much does jake have
    6·2 answers
  • What equals 2 times but adds up to -4
    13·1 answer
  • If it were two hours later,it would be half as long until midnight as it would be if it were an hour later. what time is it now.
    13·1 answer
  • Stephen was disappointed in his grade on a recent statistics test. He calculated his 2-score and found that it was 0.45. What pe
    7·1 answer
  • the school is selling tickets to the anual talent show on the first day they sell 14 adult tickets and 2 student tickets for a t
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!