Refer to Table 1.4 (in Section 1.3).

TABLE 1.4

a. Using the class intervals in the table, construct a histogram in which the heights of the rectangles are equal to the frequencies.

b. Using the class intervals in the table, construct a histogram in which the heights of the rectangles are equal to the densities.

c. Compare the histograms in parts (a) and (b) with the histogram in Figure 1.8, for which the heights are the relative frequencies. Are the shapes of the histograms the same?

Transcribed Image Text:

Class Interval (g/gal) Relative Frequency Frequency Density 1-< 3 3-< 5 5-<7 7-< 9 9-< 11 12 11 18 0.1935 0.1774 0.2903 0.1452 0.0968 0.0887 0.1452 0.0726 0.0806 0.0161 0.0323 0.0000 5 0.0403 0.0081 0.0161 0.0000 11-< 13 13-< 15 15-< 17 17-< 19 19-< 21 21-< 23 23-< 25 2 0.0323 0.0161 0.0000 0.0161 0.0161 0.0081 0.0000 0.0081 0.30 0.20 0.10 9 11 13 15 17 19 21 23 25 Emissions (g/gal) Relative Frequency