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
Verizon [17]
3 years ago
7

What is the value of the correlation coefficient r of the data set?

Mathematics
2 answers:
bogdanovich [222]3 years ago
8 0

Answer: −0.28

Step-by-step explanation: i took the test, it's -0.28

enyata [817]3 years ago
4 0

The correct option will be:  C) 0.84

<u><em>Explanation</em></u>

Formula for Correlation coefficient :

r= \frac{n(\Sigma xy)-(\Sigma x)(\Sigma y)}{\sqrt{[n\Sigma x^2-(\Sigma x)^2][n\Sigma y^2-(\Sigma y)^2]}}

First, for each point(x, y), we need to calculate x², y² and xy .

Then, we will find sum all x, y, x², y² and xy, which gives us Σx, Σy, Σx², ∑y² and Σxy

<em>(Please refer to the attached image for the table )</em>

Here we got, ∑x = 44 , ∑y = 183 , ∑x² = 362 , ∑y² = 6575 and ∑xy = 1480

'n' is the total number of data set, which is 7 here.

So, plugging those values into the above formula..........

r= \frac{n(\Sigma xy)-(\Sigma x)(\Sigma y)}{\sqrt{[n\Sigma x^2-(\Sigma x)^2][n\Sigma y^2-(\Sigma y)^2]}}\\ \\ r=\frac{7(1480)-(44)(183)}{\sqrt{[7(362)-(44)^2][7(6575)-(183)^2]}}\\ \\ r=\frac{10360-8052}{\sqrt{(598)(12536)}}\\ \\ r=\frac{2308}{\sqrt{7496528}}\\ \\ r=0.84

So, the value of the correlation coefficient is 0.84

You might be interested in
Find the x and y intercepts for the following. X= -(y-1) ^2-2
Vanyuwa [196]

Answer:

x intercepts: (-3, 0)

y intercepts: (None)

Step-by-step explanation:

6 0
2 years ago
What is 13/25 in decimal form​
kenny6666 [7]

Answer:

0.52

Step-by-step explanation:

8 0
2 years ago
Bethany has 28 oatmeal cookies and 36 peanut butter cookies to pack. each bag will contain only one kind of cookie,and every bag
m_a_m_a [10]
252 bags will be there.
it is the LCM of 28 and 36
8 0
3 years ago
Is -6.0 the same as 6?
Zepler [3.9K]

Answer:

No

Step-by-step explanation: The reason -6.0 isn't that same as 6 is because -6.0 is negative and 6 is positive

6 0
3 years ago
Read 2 more answers
A fitness center charges $3 per visit plus a monthly fee of $30. How much would it cost in one month if Ella has 18 visits?
suter [353]
Her total should be 84. You have your 30 dollars that will not change which you need to add to the amount of every visit. To find the amount for each time she went you have to do 3*18 because she went 18 times for 3 dollars each. Your answer to 3*18 should be 54. You now have to add those 54 to the 30 per month. 30+54. That should be 84
3 0
3 years ago
Read 2 more answers
Other questions:
  • What is the value of x?<br><br> A. 124<br> B. 112<br> C. 68<br> D. 62
    8·2 answers
  • 18, 19, and 20 please!
    13·1 answer
  • describe the process for finding the product or quotient of two numbers with the same sign and the product or quotient of two nu
    7·1 answer
  • Ayeud 1123, MS. Syuley McNTICKS HOIUS
    11·1 answer
  • An angle measures 31 . What is the measure of its complement?
    6·2 answers
  • 2x + 3 + 4(x + 6) -3x=0<br><br> Solve for x
    8·1 answer
  • sandy has 200$ in her bank account if she writes 6 checks for exactly $19.18 what expression describes the change in her bank ac
    9·1 answer
  • Help me pls!!! Find DC*BC
    6·1 answer
  • What number line represents the solution for the inequality -1\2x&gt;4
    9·1 answer
  • 3. Penguins can swim at speeds of up to 29 feet per second. Use dimensional analysis to
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!