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3 years ago

What is the value of r^2 for the following data to three decimal places

Mathematics

2 answers:

NikAS [45]3 years ago

6 0

Answer:

Step-by-step explanation:

Given that x and y are two variables as listed below

We have to find r^2 the coefficient of determination

x y xy x^2 y^2

1 2 2 1 4

2 4 8 4 16

5 7 35 25 49

7 10 70 49 100

10 20 200 100 400

------------------------------------------

25 33 315 179 569

Mean x = 5: Var X= 35.8-25 =10.8: std devX =3.286

Mean Y = 6.6 Var Y=113.8-43.56=70.24L std dev Y = 8.381

Cov (XY) = 63-5(6,6) = 27

r = cov/S_x S_y

r=0.980

r^2 =0.9612

BigorU [14]3 years ago

3 0

B. 0.930 ~Apex ;) .....................................

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