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Gelneren [198K]
3 years ago
8

What is the correlation coefficient with the following data point: (1,6), (3,2), (7,5), (6,2)

Mathematics
2 answers:
crimeas [40]3 years ago
6 0
R = -0.2789
I used this website: http://zweigmedia.com/RealWorld/newgraph/regressionframes.html


alina1380 [7]3 years ago
6 0

Answer:

-0.2789

Step-by-step explanation:

The Correlation Coefficient can be calculated with the following formula

r=\frac{Cov(X,Y)}{Var(X)Var(Y)}

or

r=\frac{n \sum XY-(\sum(X)\sum(Y)}{\sqrt{[n\sum X^2-(\sum X)^2][n\sum Y^2-(\sum Y)^2]}}

We can do the auxiliary calculations in excel and replace in the formula

r=\frac{4\times59-(17\times19)}{\sqrt{[4 \times 95-(17)^2][4\times69-(15)^2]}}=-0.2789

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At a neighborhood cookout,
allochka39001 [22]

Answer 45

Step-by-step explanation:

Because 2 times 5 is 10 so 7 times 5 is 35 then add them together.

3 0
3 years ago
Which would not be a step in solving 5x + 15 + 2x = 24 + 4x?
Klio2033 [76]

Answer:

A. Use the distributive property.

Step-by-step explanation:

We cannot use the distribute property because there are not parentheses to distribute a number through.

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We can collect the terms, and isolate the variable

8 0
3 years ago
What measure of center best represents the data set?
inysia [295]
I feel like it would be mean or median, because there is no outlier, making it so that all of the numbers are closely put together.

Put the set into order.

25, 26, 27, 28, 29

So, we know that this is all in order, making it so that we know for sure that there is no outlier. 

If you find the mean, it'll represent the data nicely. 

We know that both the mean and median represent the data set nicely, because it just does. It's one of those things that are extremely painful and hard to fully explain and have someone understand, but don't worry, it makes sense.

So, it can't just be the mean only or the median only.

It also can't be the mode only, because THERE IS NO MODE! 

So, our final answer is mean or median :)

~Hope I helped!~
7 0
4 years ago
(3x²+4x-1)+(-2x²-3x+2)
Troyanec [42]

Answer:

x

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Evaluate c-2c−2c, minus, 2 when c=7c=7c, equals, 7.
____ [38]

Answer:

the correct answer would be 5

Step-by-step explanation:

when c=7, then we put that value in for c in the equation c-2

c-2

(7)-2

5

3 0
3 years ago
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