Question 1
The Road King Tire Company in Birmingham wants to monitor the quality of the tires it manufactures. Each day the company quality-control manager takes a sample of 100 tires, tests them, and determines the number of defective tires. The results of 20 samples have been recorded as follows:
Sample
Number of Defectives
?1
14
?2
12
?3
?9
?4
10
?5
11
?6
?7
?7
?8
?8
14
?9
16
10
17
11
18
12
10
13
19
14
20
15
17
16
18
17
18
18
22
19
24
20
23
Construct a P-chart for this process using.png” alt=”@uni:href”>limits and describe the variation in the process.