20. A survey was created to assess the number of hours students work per week (X) and their exam grade on a 30-point test ( Y). The researchers research hypothesis suggested that number of hours worked per week will be correlated with exam grades. The researchers collected the following data from 10 students. Use this data to answer a-n. REMEMBER TO TRIPLE CHECK YOUR MATH AND ROUND TO THE THOUSANDTHS PLACE! Student XY Hours Exam X2 Y2 Worked Grades (X Lol lugn (Y) 30 14 7 25 4 27 26 12 18 16 15 22 6 28 12 20 16 smoshid 3 29 fast n = 10 26 EX= SX 2 = EXY= a. Plot the data on a scatterplot. ( 1) b. Compute the correlation coefficient (r)- SHOW ALL YOUR WORK. adW 81 (Inion