A researcher recorded the number of hours students spent practicing a musical instrument and matched these values with their scores on a music proficiency test. If we find that the correlation coefficient r = 0, what does this indicate in above situation?

There is absolutely no relationship between the variables.

The test scores are entirely random and unrelated to practice hours.

There is no linear relationship, but a non-linear relationship might exist.

The students who practiced more always scored lower on the test.