Question

A firm in the upper Midwest manufactures light bulbs. Before the bulbs are released for shipment, a sample of bulbs is selected for inspection. Inspectors look for non-conformances such as scratches, weak or broken filaments, incorrectly bored turns, insufficient outside contacts, and others. A sample of thirty five 60-watt bulbs has just been inspected, and the results are shown here. Use these data to construct a c chart.

Bulb Number	Number of Non-conformances	Bulb Number	Number of Non-conformances
1	0	19	2
2	1	20	0
3	0	21	0
4	0	22	1
5	3	23	0
6	0	24	0
7	1	25	0
8	0	26	2
9	0	27	0
10	0	28	0
11	2	29	1
12	0	30	0
13	0	31	0
14	2	32	0
15	0	33	0
16	1	34	3
17	3	35	0
18	0

Answer 1

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