A statistician wants to look at how hours studying and exam grades are related in a small class of nine students. Hours Exam Studying Grade 18 75 25 86 14 68 18 64 22 99 1 l 39 12 57 16 88 8 80 What is the covariance of these data? 0 54.714 0 46.025 0 None of these answers 0 55.875 0 49.667 What is the coefficient of correlation of these data? 0 0.489 0 None of these answers 0 0.531 o 0.569 O 0.836 What is the relationship between the two variables? 0 Can't be determined 0 Weakly negative 0 Weakly positive 0 Moderately positive 0 Moderately negative