Find the standard deviation for the indicated sets of numbers. A calculator may be used.

The miles traveled in Exercise 15

Data from Exercises 15

Use the following data. 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.

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