Chapter 15, Problem 57E

Exercises 57 and 58 refer to the mode of a data set. The mode of a data set is the data point that occurs with the highest frequency. When there are several data points (or categories) tied for the most frequent, each of them is a mode, but if all data points have the same frequency, rather than say that every data point is a mode, it is customary to say that there is no mode.

1. Find the mode of the data set given by Table 15-20 (Exercise 30).

2. Find the mode of the data set given by Fig. 15-15 (Exercises 11 and 12).

Table 15-20 shows ages of the firefighters in the Cleansburg fire department.

Table 15-20

Age	25	27	28	29	30
Frequency	2	7	6	9	15
Age	31	32	33	37	39
Frequency	12	9	9	6	4

Exercises 11 and 12 refer to the bar graph shown in Fig. 15-15 describing the scores of a group of students on a 10-point math quiz.