Recall that Table 1.8 presents the satisfaction ratings for the XYZ-Box video game system that have been given by 65 randomly selected purchasers. Figure 2.15 gives the Excel output of a histogram of these satisfaction ratings.

Figure 2.15

a. Describe where the satisfaction ratings seem to be concentrated.
b. Describe and interpret the shape of the distribution of ratings.
c. Write out the eight classes used to construct this histogram.
d. Construct a cumulative frequency distribution of the satisfaction ratings using the histogram classes.

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Composite Scores for the Video Game Satisfaction Rating Case os VideoGame TABLE 1.8 44 46 44 39 44 42 45 44 45 42 47 38 45 45 46 42 44 40 46 43 42 43 47 46 45 41 47 48 44 38 43 43 44 42 45 41 41 46 45 40 45 44 40 43 44 40 46 44 44 39 41 41 44 40 43 38 46 42 39 43 39 45 43 36 41 Н K N 1 Rating Frequency Histogram of Video Game Ratings 36 3 38 25 4 40 O Frequency 42 12 20 20 44 20 46 16 16 8. 48 4 15 More 12 10 11 10 12 13 14 15 16 17 18 36 38 40 42 44 46 48 More 19 Rating Upper Class Boundary 20 21 22 Frequency