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
Which of the following is an example of a subset? The number of IT employees out of all employees working in an office of Google
marta [7]

Answer:

The number of IT employees out of all employees working in an office of Google

Step-by-step explanation:

The answer is the first one, because the rest Just describes a group of People, a subset is a part of a larger group of related things, while the others describes just a group of people, the first one which is the answer describes a group of people that's part of a larger group of people,

The subset is the IT employees working in an office for Google

whIle the main set is All employees working in an office of Google

4 0
3 years ago
A clothing shop is offering a
KatRina [158]

Step-by-step explanation:

the correct answer is

discount price=(original price)(1-0.12)

let's suppose the original price is $10 then the discounted price will be

(10)(1-0.12)=10(.88)=$8.8

4 0
3 years ago
Lucy is raising money for a school trip by selling lollipops and bags of
sukhopar [10]
<h3>16 lollipops and 9 bags of chips are sold</h3>

<em><u>Solution:</u></em>

Let "x" be the number of lollipops sold

Let "y" be the number of bags of chips sold

Cost of 1 lollipop = $ 1.50

Cost of 1 bag of chip = $ 1.75

<em><u>Yesterday Lucy made $39.75 from selling a total of 25  lollipops and bags of chips</u></em>

Therefore,

x + y = 25

y = 25 - x -------- eqn 1

<em><u>Yesterday Lucy made $39.75</u></em>

Therefore,

number of lollipops sold x Cost of 1 lollipop + number of bags of chips sold x Cost of 1 bag of chip = 39.75

x \times 1.50 + y \times 1.75 = 39.75

1.5x + 1.75y = 39.75 -------- eqn 2

<em><u>Substitute eqn 1 in eqn 2</u></em>

1.5x + 1.75(25 - x) = 39.75

1.5x + 43.75 - 1.75x = 39.75

0.25x = 4

<h3>x = 16</h3>

<em><u>Substitute x = 16 in eqn 1</u></em>

y = 25 - 16

<h3>y = 9</h3>

Thus 16 lollipops and 9 bags of chips are sold

7 0
3 years ago
What is the product of 0.02 and 0.7
daser333 [38]
0.014 is the answer.

Hope i will get the brainiest answer.
7 0
3 years ago
Read 2 more answers
The prime factorization of 293 in expanded form
Alex787 [66]
<span>You've come to the right place. Here is the answer: None, because 293 is a prime number.</span>

Hope I Helped You!!! :-)

Have A Good Day!!!
4 0
3 years ago
Other questions:
  • The difference of a number n and the number 8 is 42. Which of
    13·1 answer
  • Which equation is a proportion?
    9·1 answer
  • Significance tests A test of H0: p = 0.65 against Ha: p &lt; 0.65 has test statistic z = −1.78. (a) What conclusion would you dr
    12·1 answer
  • What number should be placed in the box to help complete the division calculation?
    7·1 answer
  • How can you know if statement is true? <br> 1/2+3/8=4/10=2/5
    15·1 answer
  • 3,0 and 4,l what is the y-intercept of the line
    8·1 answer
  • Please help! 7/20, will give brainliest. I do not tolerate spam answers!
    8·1 answer
  • Round each to the nearest cent.<br> $21.277<br> $967.46
    15·1 answer
  • PLEASE HELP WILL MARK BRAINLIEST NO FAKE ANSWERS OR WILL BE REPORTED
    14·1 answer
  • Express 1 m as a percentage of 56 mm
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!