Question

The following data gives the number of hours 77 students spent studying and their corresponding grades on their exams.

Hours Spent Studying	0	1.5	2.5	3	4.5	5	6
Grades	63	72	78	81	87	90	93

Step 1 of 3:

Calculate the correlation coefficient, r. Round your answer to six decimal places.

Step 2 of 3:

Determine if r is statistically significant at the 0.05 level

Step 3 of 3:

Calculate the coefficient of determination, r2. Round your answer to three decimal place

Answer 1

The statistical software output for this problem is :

Step 1 :

correlation coefficient, r = 0.994052

Step 2 :

P-value = 0.000

r is statistically significant at the 0.05 level

Step 3 :

coefficient of determination, r ² = 0.988