The following data are shaped roughly like a normal distribution (discussed in Chapter 6).

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?

61.4 27.3 26.4 37.4 30.4 47.5 63.9 46.8 67.9 19. 81.6 47.9 73.4 54.6 6 53.371.6 58.6 57.3 87.8 7 74. 48.9 60.2 54.8 60.5 32.5 61.7 55. 48.2 56.8 60 52.9 60.5 55.6 38.1 76.4 46.8 19.9 27.377.458.1 32. 54.9 32.7 40. 52.7 32.5 35.3 39.1