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
lianna [129]
2 years ago
5

A study looked at n=238 adolescents, all free of severe illness.23 Subjects wore a wrist actigraph, which allowed the researcher

s to estimate sleep patterns. Those subjects classified as having low sleep efficiency had an average systolic blood pressure that was 5.8 millimeters of mercury (mm Hg) higher than that of other adolescents. The standard deviation of this difference is 1.4 mm Hg. Based on these results, test whether this difference is significant at the 0.01 level.
Mathematics
1 answer:
Vesnalui [34]2 years ago
8 0

Answer:

Step-by-step explanation:

Since n < 30, we will find the t-score and compare that to the t-score of a significance level of 1%.    

Since they are asking if the difference is significant, we will have a two tailed test, with degree of freedom being 22, so our critical values are

t < -2.704 and t > 2.704

Our t-value for this situation is

t = ([µ + 5.8] - µ)/(1.4/√23)

It's µ + 5.8 because the problem told us that their levels are 5.8 mm higher than the average, so it's the average, plus 5.8

Simplify the equation...

t = 5.8/(1.4/√23)

t = 19.868

19.868 > 2.704, the evidence supports that there is significant difference between the sample and the population

You might be interested in
What is the value of x in the equation -6x= 5x + 222<br> -22<br> -2<br> 2
Leokris [45]

Answer:

x=-20\frac{2}{11}

Step-by-step explanation:

- 6x = 5x + 222

- 222 = 5x + 6x

11x = - 222

x = - 222 : 11

x = - 222/11

x=-20\frac{2}{11}

5 0
3 years ago
Solve the equation<br> 12 + 4m = 24<br> A)m=9<br> B)m=8<br> C)m=3<br> D)m=-6
pantera1 [17]
12 +4m = 24

4m = 12

m = 12/4

m = 3  so choice C. is right sure 
8 0
3 years ago
Pleaseeee helpppp !!!!!!!! Will mark Brianliest !!!!!!!!!!!!!
Goryan [66]

Answer:

I think you're supposed to add all the fives together. That is what MY teacher taught me to do :/

Step-by-step explanation:

The shape is a square that is tilted and looks like a rhombus. Just add the 5's together.

4 0
2 years ago
3. What is slope of the line above?<br> 4. What is slope of the line above?<br><br><br> help!
Olin [163]
The answer is

3.) -1/2
4.) 4/3
3 0
3 years ago
Solve for x 4x(x+1)=(2x-3)(2x+5)
natima [27]

The pic is your answer.

5 0
2 years ago
Other questions:
  • O que é uma divisão finita?
    15·2 answers
  • Show how u got the answer and someone help me please
    7·2 answers
  • Over the last 50 years, the average cost of a car has increased by a total of 1,094%. If the average cost of a car today is $31,
    14·1 answer
  • The currency exchange for US dollars (USD) to Canadian dollars (CAD) changes daily. If the rate today is one CAD for every $0.85
    12·1 answer
  • Math help please will give brainliest
    10·1 answer
  • Each day, a local dog shelter spends an
    5·2 answers
  • Using the following function rule F(x) = 5^x + 5, the value of
    8·1 answer
  • Please help its easy but I dont understand it​
    5·1 answer
  • Given: wzx and yzx are right triangles, wx = yx. Prove wxz ~= yx .....plz answer will give brainlyest!!
    14·1 answer
  • Compare the quantities in column A and Columb B,
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!