Class Frequency 17.9-21.1 2 21.2-24.4 1 24.5-27.7 4 27.8-31.0 14 31.1-34.3 14 34.4-37.6 8 37.7-41.1 3 Table 2: Frequency Distribution Data Values Frequency 19.5 2 22.8 1 26.1 4 29.4 14 32.7 14 36.0 8 39.4 3 Table 3: Frequency Distribution with Midpoints Data Set R Mu=31.2 sd=4.5 n=46 31.0 34.9 31.4 27.4 37.6 38.2 32.8 32.0 26.4 32.3 33.9 21.4 34.7 33.3 39.5 32.5 29.1 28.0 34.9 33.5 26.9 38.4 17.9 28.9 30.8 31.3 33.8 31.6 33.7 38.3 38.3 28.2 39.0 29.1 41.1 23.6 31.6 29.3 29.2 25.8 38.6 27.2 31.1 34.0 29.3 28.3 x+ 12 10 10 15 20 25 10 5 45