A professor investigates how the personality trait of conscientiousness relates to final semester grade averages among students in her classes. She administers a test of conscientiousness then compares results to students' semester grades. The results indicate students with higher conscientiousness scores do tend to earn higher semester averages, but the relationship is very weak and insignificant. Which of the following correlation coefficient would best match these results? Group of answer choices +.16 -.09 +.91 -.55 -.87