Twelve college seniors were chosen at random and surveyed. the survey asked the participants for the number of hours they spent studying per week and their overall gpa. letting x represent the number of hours a student spent studying and y represent a student's overall gpa, the surveyor calculated the correlation coefficient between x and y to be 0.85. interpret the correlation coefficient calculated by choosing the statement below which correctly describes the correlation between x and y. a. weak positive correlation b. weak negative correlation c. strong positive correlation d. no correlation