Question 2 The marks in guitar practical examination obtained by 8 candidates over a fixed period of training time (hours) are shown in the table below. Candidate A B C D E F G H Training time (hours) 70 85 82 74 70 86 94 89 Practical mark 87 96 100 90 82 88 97 90 a) Calculate the product moment correlation coefficient and interpret the result obtained. (7 marks) b) Calculate the coefficient of determination and interpret the result obtained (3 marks) c) ~ Find the least squares regression line of the practical marks on the training time. Hence estimate the practical mark if the candidate trained 95 hours. Comment on the accuracy of your estimate. H (9 marks) d) Calculate the Spearman's rank correlation coefficient. Comment on the result. (6 marks) [Total: 25 marks]Question 2 The marks in guitar practical examination obtained by 8 candidates over a fixed period of training time (hours) are shown in the table below. Candidate A B C D E F G H Training time (hours) 70 85 82 74 70 86 94 89 Practical mark 87 96 100 90 82 88 97 90 a) Calculate the product moment correlation coefficient and interpret the result obtained. (7 marks) b) Calculate the coefficient of determination and interpret the result obtained (3 marks) c) ~ Find the least squares regression line of the practical marks on the training time. Hence estimate the practical mark if the candidate trained 95 hours. Comment on the accuracy of your estimate. H (9 marks) d) Calculate the Spearman's rank correlation coefficient. Comment on the result. (6 marks) [Total: 25 marks]