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
borishaifa [10]
3 years ago
11

The average systolic blood pressure was found to be 140 mm for people who have high responsibility jobs, specifically investment

banking jobs. Heart attack is the leading cause of death in the US, and the American Medical Association (AMA) deems average systolic blood pressure of 140 mm as very high. The fitness instructors and AMA doctors recommend practicing Yoga. They believe that practicing yoga reduces blood pressure and hence is beneficial to people. To test this claim, a sample of 51 investment bankers who had previously been diagnosed with high blood pressure was chosen. Participants were trained and completed yoga exercises for six months. At the end of the six months, the average blood pressure for the sample was 139 mm with a standard deviation of 5 mm. What is the actual (i.e. calculated) value of the test statistic?
Mathematics
1 answer:
defon3 years ago
4 0

Answer:

t = -1.428

Step-by-step explanation:

Average blood pressure among people with high responsibility jobs = u = 140 mm

Number of people sampled for the study = n = 51

Average blood pressure of the sample = x = 139 mm

Standard deviation of the sample = s = 5 mm

The claim is that practicing yoga decreases the blood pressure. So we have to test that after practicing yoga, the average blood pressure will be lesser than 140. Based on this we can formulate the null and alternate hypothesis as:

Null Hypothesis: \mu \geq 140

Alternate Hypothesis: \mu < 140

Since population standard deviation is not known, we cannot use z-distribution for this test. We are given the value of sample standard deviation, so t-test will be used for this case.

Test statistic is calculated as:

t=\frac{x-u}{\frac{s}{\sqrt{n} } }

Using the values in this formula gives us:

t=\frac{139-140}{\frac{5}{\sqrt{51}}}\\\\ t=-1.428

Therefore, the value of test statistic is -1.428

You might be interested in
9f + 4 - 7f = 8 pls help
Yuri [45]

Step-by-step explanation:

f = 2 is the correct answer

plz mark my answer as brainlist plzzzz vote me also and hope this helps you ...

4 0
3 years ago
Read 2 more answers
20 POINTS!<br><br><br> Yes or No?
tangare [24]
Answer: YES.

<span>Drawing a vertical line will cross the graph at one point only.

</span>
<span>Every x was assigned one y.</span>
8 0
3 years ago
Read 2 more answers
Can two numbers have a GCF that is bigger than their LCM? Explain how you know?
DiKsa [7]
The answer to this question would be: No, they can't

Greatest common factor biggest possible value is the number value itself. There is no factor that bigger than the number.

But the least common multiple smallest possible value is the number. There is no multiple that smaller than the number.

So it is not possible to have GCF bigger than LCM.

7 0
3 years ago
A sea lion dove from the water's surface at sea level to an altitude of −216.12 meters in 2.4 minutes. What is the average chang
alexandr1967 [171]
2.4 minutes is 144 seconds. divide -216.12 by it to get altitude per second. This is 1.5 meters per second. Multiply this by 60 to get the rate per minute, totaling 90.05 meters per minute. Sorry if this explanation was long that was how I remember.
7 0
3 years ago
Jim and Jackie are married with three children at home and a mortgage. Jim’s net pay per year is $67,000 and Jackie does not hav
Darya [45]
The answer is A. they should work on their plan for managing income. 
4 0
3 years ago
Read 2 more answers
Other questions:
  • Please help me solve the equation<br>3x+10y=48<br>7x+4y=54
    11·2 answers
  • Find the gcf of the monomial factor 15a-25b+20
    5·1 answer
  • What is the standard unit of stress in Metric Units?
    10·2 answers
  • Please help
    5·1 answer
  • Y''+y'/x-y/x^2=0 y(1)=1, y(R)=n
    10·1 answer
  • What points satisfy 2x-6y=12 (i need 3)
    15·1 answer
  • If it takes eight men ten hours to build a wall, how long would it take four men?
    6·2 answers
  • If the human heart beats an average of 62 beats in a minute, how many times will it beat in 291 minutes? A 17,942 B 18,042 229 3
    10·2 answers
  • Solve the equation 6x+3y=3 to get it into slope-intercept form.
    12·1 answer
  • <img src="https://tex.z-dn.net/?f=%28%20%7B3%20x%7D%5E%7B2%7D%20%20-%204x%20%2B%208%29%20%2B%20%28%20-%20%20%7Bx%7D%5E%7B2%7D%20
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!