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A college professor examined the hours per week that a student studied and the number of tests that the student has failed in his college career. The regression equation is as follows:

$$\text{Tests failed}= 15.6-0.802 \times \text{hours studied}$$

Predictor Coef SE Coef T P
Constant 15.598 2.720 5.73 0.000
Hours Studied -0.8025 0.3767 -2.13 0.057



$S = 6.29484$
$r^2 = 29.2\%$
$r^2\text{(adjusted)} = 22.8\%$

What is a valid interpretation of the correlation coefficient, $r$?

A

Strong and positive.

B

Moderate and positive.

C

Weak and positive.

D

Moderate and negative.

E

Weak and negative.

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