The following data represent exam scores in a statistics class taught using traditional lecture and a class taught using a "flipped" classroom. Compute (b) and (c) below.
  

Traditional Flipped 69.8 69.5 78.9 67.8 85.1 82.4 81.7 70.7 63.5 69.3 76.8 76.9 79.4 56.5 D 59.8 71.4 63.1 73.2 77.8 91.6 78.8 81.2 70.6 91.4 77.4 77.1