A teacher wants to compare how two classes performed. He records each student's nal percentage in the tables below. Class A 51 46 41 38 44 81 85 71 76 64 96 81 T4 76 81 Class B 44 81 70 82 5D 70 6D 81 97 90 34 43 77 6D 33 a) Without computing the mean, say which class has the higher mean and why you think so. Class B has the higher mean because the numbers center around a higher value than those of 0 Class A. Class B has the higher mean because the numbers center around a lower value than thOSe of Class A. Class A has the higher mean because the numbers center around a lower value than those of Class B. Class A has the higher mean because the numbers center around a higher value than those of Class B. b) Compute the mean for each class. You may round to two decimal places. i) Class A ii) Class B c) Without computing the standard deviation for each class, say which class has the higher standard deviation and why you think so. O Class A has the higher standard deviation because the spread is greater than that of Class B. O Class B has the higher standard deviation because the spread is less than that of Class A. O Class A has the higher standard deviation because the spread is less than that of Class B. O Class B has the higher standard deviation because the Spread is greater than that of ClaSS A. d) Compute the standard deviation for each class. You may round to two decimal places. i) Class A ii) Class B SI