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]
3 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]3 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
What is the difference between a standard normal distribution and a nonstandard normal​ distribution? Choose the correct answer
devlian [24]

Answer:

b)The standard normal distribution has a mean of 0 and a standard deviation of​ 1, while a nonstandard normal distribution has a different value for one or both of those parameters.

Step-by-step explanation:

The standard normal distribution, ( and associated tables )  N (0,1) where 0 is the mean and 1 the standard deviation, is a model representative of all other nonstandard normal distribution. Therefore we apply such concepts and tebles in the solution of problems concerning normal distribution

8 0
3 years ago
I need help pls and thank you
Aleks [24]
The fourth table is the correct answer
6 0
3 years ago
What is the range of the function y= squareroot of x+5?
Mnenie [13.5K]
Y + 5 = 0
y >= -5
Therefore, you would choose the first answer.
5 0
2 years ago
Read 2 more answers
Find m(x) = f(x) * h(x)<br><br> Values - f(x) = -3x + 6; g(x) = 7x -5; h(x) = -2
Lisa [10]

Answer:

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
3x - 12y = 24<br><br> Which of the following points represents the x and y intercepts?
umka21 [38]

Answer:

You need to categorize this to the form y=mx+c / y=mx+b

So,

12y=y & 3x=x

(Just let me know if u need further explanation or if this wasn't the ans. u were looking for)

7 0
3 years ago
Other questions:
  • A shop has an offer on jumpers as shown below.
    7·2 answers
  • A bend used to clear an obstruction and return to the original line of run is called a(n)
    11·2 answers
  • The given line segment has a midpoint at (−1, −2).
    13·2 answers
  • Needs help with linear equations got 10 questions in all the picture posted is the first one.
    15·1 answer
  • What’s the answer for this question?
    5·1 answer
  • Find the factor pairs for 12.
    13·1 answer
  • What is 434 miles in 7 hours as a rate
    8·2 answers
  • Please help i’ll give brainliest
    15·1 answer
  • the question is: The endpoints of ST are S(2,-2) and T(4,2) what are the coordinates of midpoint of ST?​
    13·1 answer
  • Find the missing term in the following sequence <br><br> -115.2, -109.9, -104.6, -99.3, -94
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!