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3 years ago

Help please ! Use a calculator to find the correlation coefficient of the data set

Mathematics

1 answer:

OverLord2011 [107]3 years ago

8 0

Answer:

The correlation coefficient of the data set is -0.985

Step-by-step explanation:

We are supposed to find the correlation coefficient of the given data

x y

5 19

7 17

10 16

15 12

19 7

Formula: $r ={\frac{n \sum_{i=1}^n x_i y_i - \sum_{i=1}^n x_i \sum_{i=1}^n y_i}{\sqrt {(n \sum_{i=1}^n x_i^2 - (\sum_{i=1}^n x_i)^2)(n \sum_{i=1}^n y_i^2 - (\sum_{i=1}^n y_i)^2)} } $$

Using calculator

r =-0.985

So, Option C is true

Hence the correlation coefficient of the data set is -0.985

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