19) Refer to the problem below to answer questions 19 & 20 I.M.Smart, a statistics nerd, wants to investigate if there is a positive linear relationship between the number of hours a student studies for a statistics exam and the student's test grade. He randomly sample 12 students that are taking staistics at a community college and records the sample data in the following table STUDENT 1 2 3 4 5 6 7 8 9 10 11 12 # STUDY HOURS 10 8 12 20 7 4 9 15 11 6 2 EXAM GRADE 80 60 78 90 65 60 70 85 75 70 45 50 Determine the sample correlation coefficient "r" O a. none of the choices O b.r=.86 O c.r=2.35 O d.r=.93 QUESTION 20 20) Referring to question 19) determine the regression equation Click Save and Submit to save and submit. Click Save All Answers to save all answers. Save All