The following data are shaped roughly like a normal distribution

(discussed in Chapter 6).

61.4 27.3 26.4 37.4 30.4 47.5 63.9 46.8 67.9 19.1 81.6 47.9 73.4 54.6 65.1 53.3 71.6 58.6 57.3 87.8 71.1 74.1 48.9 60.2 54.8 60.5 32.5 61.7 55.1 48.2 56.8 60.1 52.9 60.5 55.6 38.1 76.4 46.8 19.9 27.3 77.4 58.1 32.1 54.9 32.7 40.1 52.7 32.5 35.3 39.1 Construct a frequency distribution starting with 10 as the lowest class beginning point and use a class width of 10. Construct a histogram and a frequency polygon for this frequency distribution and observe the shape of a normal distribution. On the basis of your results from these graphs, what does a normal distribution look like?