None of the previous answers 9.07 or 7.89 was correct...can I please get help with this one...part B

Question 6, 3.2.17 HW Score: 79.290, 19.8 Of 20 E Homework: homework 3.2 points Part 2 of 5 Points: 2 of 6 Save The following data represent exam scores in a statistics class taught using traditional lecture and a class taught using a "flipped" classroom. Complete parts (a) through (c) below. Traditional 71.9 69.2 78.3 66.8 86.3 78.3 56.3 81.9 81.2 71.7 63.1 68.9 59.7 Flipped 77.0 71.5 63.8 71.7 76.9 91.3 79.3 75.6 81.5 69.2 91.9 78.1 76.8 (a) Which course has more dispersion in exam scores using the range as the measure of dispersion? The traditional course has a range of 30 , while the "flipped" course has a range of 28.1 . The traditional course has more dispersion. (Type integers or decimals. Do not round.) (b) Which course has more dispersion in exam scores using the sample standard deviation as the measure of dispersion? The traditional course has a standard deviation of , while the "flipped" course has a standard deviation of The traditional course has more dispersion. (Round to three decimal places as needed.)