Question

(a) how many bottling plants had from 11 to 17 work stoppages? (b) how many bottling plants had 18 or more work stoppages? (c) what is the class width?

Explanation:

Step1: Analyze part (a)

Looking at the bar - graph, the bar for the interval \(11\) to \(17\) has a height of \(6\). So the number of bottling plants in the \(11 - 17\) work stoppages interval is read directly from the graph.

Step2: Analyze part (b)

For \(18\) or more work stoppages, we consider the intervals \(18 - 24\), \(25 - 31\), and \(32 - 38\). The heights of these bars are \(4\), \(8\), and \(7\) respectively. We sum them up: \(4 + 8+7\).
$$4 + 8+7=(4 + 8)+7=12 + 7 = 19$$

Step3: Analyze part (c)

The class - width is calculated as the difference between the upper and lower limit of a class interval. For example, taking the interval \(4 - 10\), the class - width is \(10-4\).
$$10 - 4=6$$

Answer:

(a) \(6\)
(b) \(19\)
(c) \(6\)