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
mash [69]
2 years ago
6

The correlation between two variables is –0.63 for a sample of 20 observations. What is the coefficient of determination between

the two variables? 0.63 0.3969 0 .7937 We can’t determine it because sample size is smaller than 30.
Mathematics
1 answer:
erastovalidia [21]2 years ago
7 0

Answer:

b) 0.3969

Step-by-step explanation:

Given that the correlation between two variables is –0.63 for a sample of 20 observations.

Correlation is the measure of linear association between two variables.  Normally this varies from -1 to 1 . Here this is given as -0.63

Coefficient of determination has to be found out

Coefficient of determination, being the cause of variation caused by one variable on another is obtained by square correlation coefficient.

Hence coefficient of determination = r^2 = (-0.63)^2\\=0.3969

Hence correct option is option b) 0.3969

You might be interested in
The product of three whole numbers is 120 how many different possibilities are there for the three whole numbers
Sphinxa [80]
We can factor 120 into
2 * 2 * 2 * 3 * 5

I think there are nine different possibilities
1) 8 * 3 * 5
2) 4 * 2 * 15
3) 4 * 6 * 5
4) 4 * 10 * 3
5) 2 * 2 * 30
6) 2 * 3 * 20
7) 2 * 5 * 12
8) 2 * 6 * 10
9) 2 * 15 * 4



8 0
3 years ago
Read 2 more answers
If 2a+4b=5 and a is equal to three times b, what is 3a?
IrinaK [193]

Answer:

3a=4.5

Step-by-step explanation:

it says that "a is equal to 3 times b", which translates to a=3b

We can substitute a as 3b in 2a+4b=5

2(3b)+4b=5

multiply

6b+4b=5

add

10b=5

divide by 10

b=1/2

since it's given that a=3b, we can multiply 1/2 by 3

a=3/2

3a is 3 times a, so we can mutiply 3(3/2)=9/2=4.5

Hope this helps!

7 0
3 years ago
A piece of wire 23 m long is cut into two pieces. One piece is bent into a square and the other is bent into an equilateral tria
MArishka [77]
The square is 12 m long and the triangle is 11 m long
4 0
3 years ago
The ellipse 14x2+2x+y2=114x2+2x+y2=1 has its center at the point (b,c)(b,c) where
Nana76 [90]
18x^2 + 2x + y^2 = 1 
<span>==> 18(x^2 + x/9) + y^2 = 1 </span>
<span>==> 18(x^2 + x/9 + 1/324) + y^2 = 1 + 1/18 </span>
<span>==> 18(x + 1/18)^2 + y^2 = 19/18 </span>
<span>==> (x + 1/18)^2/19 + (y - 0)^2/(19/18) = 1. </span>

<span>By comparing this to the standard form of an ellipse, the center is at (-1/18, 0). </span>
6 0
3 years ago
Can someone pls help for brainlest
ch4aika [34]
Answer:
455 square kilometers
step-by-step explanation:
a = l • w
24 • 24
576
because there is a space where it isn’t shaded we have to find the area of that as well
11 • 11
121
now just subtract
576 - 121
455
5 0
3 years ago
Read 2 more answers
Other questions:
  • Pl help me <br> WILL GIVE BRAINLIEST
    14·1 answer
  • What is the solution to 6y-(2y-5)=29
    7·1 answer
  • 2/5 write two equivalent fraction
    13·2 answers
  • Please help Geometry 30 points plus brainliest ...
    9·1 answer
  • A baseball stadium charges $8 handling fee per ticket. It also charges a single $2.50 handling fee when purchasing 8 or fewer ti
    13·1 answer
  • Find the mid-point of<br> (-2, 1, 4), (7, 3, -1)
    10·1 answer
  • In the Special Right Triangle below, solve for the value of y. Y = _____ (keep your answer in simplest radical form)
    10·1 answer
  • How did Dana's profit change? Complete
    11·2 answers
  • Please help and how do you know this answer
    8·2 answers
  • If a series of rigid transformations maps ∠E onto ∠B where ∠E is congruent to ∠B, then which of the following statements is true
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!