Question

Use a graphing calculator to find the value of the correlation coefficient r and determine if there is a strong correlation among the data.
(1, 5), (4, 8), (8, 3), (13, 10), (19, 13)

Answer 1

Using a calculator, the correlation coefficient is of 0.7649. Since the correlation is greater than 0.6, there is strong correlation.

What is a correlation coefficient?

• It is an index that measures correlation between two variables, assuming values between -1 and 1.

• If it is positive, the relation is positive, that is, they are direct proportional. If it is negative, they are inverse proportional.

• If the absolute value of the correlation coefficient is greater than 0.6, the relationship is strong.

Using a calculator, we insert the points (x,y) to find the coefficient. In this problem, the points are given as follows:

(1, 5), (4, 8), (8, 3), (13, 10), (19, 13)

The coefficient is of 0.7649. Since the correlation is greater than 0.6, there is strong correlation.

More can be learned about correlation coefficients at brainly.com/question/25815006

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