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]
3 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]3 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
Answer this please, I am really struggling, I know I have been toxic in the past - answering questions just for the points, but
dmitriy555 [2]

Answer:

4x+4x+42+2x-12=180 Degrees (Angle Sum of a Triangle)

10x+30=180

10x=150

x=15

Step-by-step explanation:

Hope this helps! You will always be forgiven if you change. :)

8 0
1 year ago
Justin is redoing his bathroom floor with tiles measuring 6in by 13 in. the floor has an area of 8,500 in². what is the least nu
enyata [817]
He will need 109 tiles
7 0
3 years ago
Read 2 more answers
Need help! Law of cosines...find b round to the nearest tenth please
dusya [7]
ANSWER

B = 27.8 \degree

EXPLANATION

The law of cosine is given by the formula:

{b}^{2} = {a}^{2} + {c}^{2} - 2bc \cos(B)

From the diagram,

a=17, b=8, c=16

We substitute the given values into the formula to obtain:

{8}^{2} = {17}^{2} + {16}^{2} - 2(17)(16)\cos(B)

64 = 289+ 256- 544\cos(B)


64 = 545- 544\cos(B)


64 - 545 = - 544\cos(B)

- 481 = - 544\cos(B)

\frac{ - 481}{ - 544} = \cos(B)

cos(B) = 0.88419

B = \cos ^{ - 1} (0.88419)

B = 27.8 \degree
3 0
3 years ago
Read 2 more answers
The sum of a square root of a number and 6 is the number
vodka [1.7K]

Answer:

8 is the number you seek

Step-by-step explanation:


4 0
3 years ago
A gymnast dismounts the uneven parallel bars. Her height, h, depends on the time, t, that she is in the air h = −162 + 24t + 16.
dimulka [17.4K]
That is when h=0
so assuming yo meant
h(t)=-16t²+24t+16
solve for t such that h(t)=0
because when height=0, the gymnast hits the ground

so
0=-16t²+24t+16
using math (imma complete the square
0=-16(t²-3/2t)+16
0=-16(t²-3/2t+9/16-9/16)+16
0=-16((t-3/4)²-9/16)+16
0=-16(t-3/4)²+9+16
0=-16(t-3/4)²+25
-25=-16(t-3/4)²
25/16=(t-3/4)²
sqrt both sides
+/-5/4=t-3/4
3/4+/-5/4=t
if we do plus (because minus would give us negative height)
8/4=t
2=t
it takes 2 seconds
5 0
3 years ago
Other questions:
  • Whats the answer and proof of 12=4-1/4x
    12·1 answer
  • How do you round an irrational number to the nearest hundredth
    5·1 answer
  • Find the common difference for the given sequence 1.05, 1.1, 1.15, 1.2,... A)0.005 B)0.05 C)0.5
    8·1 answer
  • For which prime p,p4+8 is also a prime number
    8·1 answer
  • A function with an input of 4 has an output of 10. Which of the following could not be the function equation?
    14·1 answer
  • Please Help! Geometry
    15·1 answer
  • Select the ordered pair that is a solution to the function. (A point on the line.)
    7·1 answer
  • I want Mark best answer
    15·2 answers
  • 8/3​ c−2= 2/3 ​ c−12
    9·1 answer
  • 3. Mr Chen's salary was $2800. He spent $1500 and gave the rest equally to each of his 3 daughters and 2 sons. How much did each
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!