4.24 Here are recent U.S. News & World Report data on acceptance rates at the top 70 national universities. These are the percentages of accepted students out of all students who applied. 6.3 14.0 8.9 21.6 40.6 51.2 50.5 69.4 42.4 68.3 8.5 12.4 18.0 30.4 31.4 51.3 47.5 49.4 54.6 63.5 7.7 12.8 18.8 25.5 28.0 33.4 38.3 25.0 49.4 56.7 7.0 10.1 24.3 23.0 32.7 46.0 52.4 31.6 44.7 62.8 16.3 18.0 16.4 33.3 40.0 35.5 67.6 43.2 57.9 63.3 9.7 18.4 26.7 39.9 34.6 39.6 46.6 34.5 47.3 61.1 7.1 16.5 18.1 21.9 34.1 45.7 58.4 63.4 63.0 46.6

a. Calculate the mean of these data, showing that you know how to use the symbols and formula.

b. Determine the median of these data.

c. Describe the variability in these data by computing the range.