In testing a new electric engine, an automobile company randomly selected 20 cars of a certain model and recorded the range (in mi) that the car could travel before the batteries needed recharging. The results are shown below.

Find the relative frequencies for the classes given in Exercise 15.

Data from Exercises 15

Using the classes 141−44, 144 −147, . . . , 153−156, form a frequency distribution table. Use the convention that the left endpoint is included in each class, but not the right endpoint.

Transcribed Image Text:

143, 148, 146, 144, 149, 144, 150, 148, 148, 144 153, 146, 147, 146, 147, 149, 145, 151, 149, 148