Question

Use a calculator to find the correlation coefficient of the data set.

Please provide detailed explanation. (How to get answer)

Answer 1

the answer is -0.953

Answer 2

The correct option is C.

Explanation:

The given data table is

x y

2 15

6 13

7 9

8 8

12 5

Using calculator we get

Mean of x =7

Mean of y =10

`SS_x=52`

`SS_y=64`

`r=-0.9534\approx -0.953`

The correlation coefficient of the data set is -0.953.

Therefore the correct option is C.