Sloppy writing about correlation. Each of the following statements contains a blunder. Explain in each case what is wrong.

(a) “There is a high correlation between a college student’s major and his or her starting salary after graduation.”

(b) “We found a high correlation (r = 1.09) between the scores of students on the first and second exams in our statistics course.”

(c) “The correlation between number of years of education and income was found to be r = 0.53 years.”