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Tanya [424]
3 years ago
11

Which of the choices below is not a possible correlation coefficient?

Mathematics
1 answer:
fiasKO [112]3 years ago
8 0

Answer:

The condition for r is the following:

-1 \leq r \leq 1

And for this case if we analyze the options the only impossible value is given by:

1.0528

Because this value is higher than 1 and not satisfy the general limits for r

Step-by-step explanation:

The correlation coefficient is a measure of dispersion and is a value between -1 and 1, and is defined as:

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

The condition for r is the following:

-1 \leq r \leq 1

And for this case if we analyze the options the only impossible value is given by:

1.0528

Because this value is higher than 1 and not satisfy the general limits for r

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Solve for x <br>3(x - 2) = 6x - 12<br>​
nalin [4]

Answer:

The answer is 2

Step-by-step explanation:

Here's how I got it:

3(x - 2) = 6x - 12

Multiply 3 times x and 3 times 2, this is what you would get

3x - 6 = 6x - 12

Then, subtract the lowest x with the bigger X, this way you would have x on one side:

3x - 6 = 6x - 12

-3x        -3x

This is what you should have after this:

-6 = 3x - 12

Now, to get the variable (letter that represents a number) by itself, you have to add 12 to both sides like this:

-6 = 3x - 12

+12        +12

You would get this:

6 = 3x

Finally, you have to get x by itself, so you have to divide 3 on both sides like this

6/3 = 3/3 x

That's why, your answer is 2

5 0
3 years ago
Point A is located at (-2, 2). Point B is located at (-2, 0). What is the distance between point A and point B ?
Andrew [12]

Answer:

2

Step-by-step explanation:

Both point a and b have an x value of -2 so to find the distance between the two points we simply have to find the horizontal distance. We can do this by subtract the y value of the first point by the y value of the second point.

Point A y value : 2

Point B y value : 0

Distance between Point A and Point B : 2 - 0 = 2 units

6 0
2 years ago
Determine the consent of variation given
melisa1 [442]

Answer:

The constant of variation is 5 (B)

Step-by-step explanation:

if R varies directly with S

R ∝ S

R =kS

k = constant of variation

when S is 16 R is 80

80 =16k

k=5

3 0
3 years ago
What is the value of x?
Alenkinab [10]

Answer:

X=5

Step-by-step explanation:

Add all up all the xs you see and the numbers near it and then it will be x and that number added up all together

4 0
3 years ago
Let $\underline{A}\ \underline{B}\ \underline{C}$ represent a three-digit base 10 number whose digits are $A$, $B$, and $C$ with
madreJ [45]

Answer:

27

Step-by-step explanation:

a=1, b=0, c =9

6 0
3 years ago
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