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
Pachacha [2.7K]
3 years ago
11

Question 7Partially correct answer. Your answer is partially correct. Try again.An article in Knee Surgery, Sports Traumatology,

Arthroscopy (2005, Vol. 13, pp. 273-279), considered arthroscopic meniscal repair with an absorbable screw. Results showed that for tears greater than 25 millimeters, 13 of 19 repairs were successful while for shorter tears, 22 of 30 repairs were successful.(a) Is there evidence that the success rate is greater for longer tears
Mathematics
1 answer:
kherson [118]3 years ago
7 0

This question is incomplete, the complete question is;

An article in Knee Surgery, Sports Traumatology, Arthroscopy (2005, Vol. 13, pp. 273-279), considered arthroscopic meniscal repair with an absorbable screw. Results showed that for tears greater than 25 millimeters, 13 of 19 repairs were successful while for shorter tears, 22 of 30 repairs were successful.

a) Is there evidence that the success rate is greater for longer tears? Use alpha=0.05

Answer:

P-value = 0.6443

Now, since the p-value( 0.6443 ) is greater than the significance level (0.05), We fail to reject null hypothesis.

Therefore, there is no significant difference in the successive proportion ( rate ). p₁ =  p₂

Step-by-step explanation:

Given the data in the question;

         Sample of tears greater than 25;

number of successive repairs X₁ = 13

number of repair n₁ = 19

proportion of successive repairs p₁ = 13/19 = 0.68

q₁ = 1 -  p₁ = 1 - 0.68 = 0.32

        Sample of tears shorter than 25;

number of successive repairs X₂ = 22

number of repair n₂ = 30

proportion of successive repairs p₂ = 22/30 = 0.73

q₂ = 1 -  p₂ = 1 - 0.73 = 0.27

so;

H₀ : There is no significant difference in the successive proportions;  p₁ =  p₂

Hₐ : The successive rate is greater for longer tears p₁ >

Significance level ∝ = 0.05

Test Statistics

Z =  (p₁ -

so we substitute

Z =  ( 0.68 - 0.73 / √[ (0.68 ×0.32 / 19) + ( 0.73×0.27 / 30 ) ]

Z = -0.05 / √[ 0.01802 ]

Z = -0.05 / 0.1342

Z = -0.37  

P-value for the given test, p = P( Z > -0.37 )

= 1 - P( Z ≤ - 0.37 )

= 1 - 0.35569

P-value = 0.6443

Now, since the p-value( 0.6443 ) is greater than the significance level (0.05), We fail to reject null hypothesis.

Therefore, there is no significant difference in the successive proportion ( rate ). p₁ =  p₂

You might be interested in
1/4x + 6 + 1/5x - 3/20x = 4.2
natta225 [31]

Answer:

6

Step-by-step explanation:

The explaination is in the picture

6 0
3 years ago
Anyone mind helping me out?
Airida [17]
<h2>6 is the answer.</h2>

just simple

3 0
3 years ago
Line A is perpendicular to line B. The slope of line A is -1/9 what is the slope of line b?
Pani-rosa [81]
\bf \stackrel{\textit{perpendicular lines have \underline{negative reciprocal} slopes}}&#10;{\stackrel{slope}{-\cfrac{1}{9}}\qquad \qquad \qquad \stackrel{reciprocal}{-\cfrac{9}{1}}\qquad \stackrel{negative~reciprocal}{+\cfrac{9}{1}}\implies 9}
4 0
3 years ago
Read 2 more answers
Pablo will take the 11:43 AM train to San Diego. The train is estimated to arrive in San Diego in 3 hours 45 minutes. What is th
11Alexandr11 [23.1K]

Answer:

3. 28pm

Step-by-step explanation:

11  43

+3 45

15 28

15.28-12

=3.28

5 0
2 years ago
What is the median of the data set 3 35 23 37 45 5 49 27 48?
Delvig [45]
First u put the numbers in order.....very important to do this
3 , 5 , 23, 27, 35, 37, 45, 48, 49

the median is the middle number. So the median is 35. 

7 0
3 years ago
Other questions:
  • If one point on a horizontal line has the coordinates (10, -3), which of the points below are also on the line? Select all that
    6·1 answer
  • Explain how you know twenty one hundredths is greather than one fifth
    15·2 answers
  • How has the school closing effected your daily life? How do you feel about learning math online? Be sure to mention some benefit
    7·1 answer
  • A rectangular prism has a length of 4 1/4 in a width of 3 in, and a height of 1 1/4 in.
    5·1 answer
  • 75% of the students who bought lunch yesterday ate chicken patties. If 120 students ate chicken patties, what was the total numb
    5·1 answer
  • PLZ HELP WITH THIS QUESTION!
    11·1 answer
  • I have to find out if there equivalent? 96 miles on 4 gallons,380 miles on 15 gallons?
    5·2 answers
  • Is it more difficult to run up a ramp with a slope of 1/5 or a ramp with a slope of 5? Explain.
    10·2 answers
  • What is the result ?
    10·2 answers
  • Write the tangent, cosine and sine ratios of angles X &amp; Y. Write each answer as a (reduced) fraction. Not a decimal.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!