A study found correlation r = 0.43 between high school math grades (on a 0 to 100 scale) and income 10 years after school. This says that the fact that hot dogs have different amounts of salt explains about
A) 18.5% of the observed variation in their calorie counts.
B) 43% of the observed variation in their calorie counts.
C) 65.6% of the observed variation in their calorie counts.
D) 98% of the observed variation in their calorie counts.

Question

Quizplus · Accepted Answer

To find the percentage of variation explained by the correlation, you square the correlation coefficient (r^2). So, 0.43^2 = 0.1849, which is approximately 18.5%.

A Study Found Correlation R = 0