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 below.

Sample	Number of Defectives	Sample	Number of Defectives
1	14	11	18
2	12	12	10
3	9	13	19
4	10	14	20
5	11	15	17
6	7	16	18
7	8	17	18
8	14	18	22
9	16	19	24
10	17	20	23

Construct a p-chart for this process using 2 limits and describe the variation in the process.

Please give a description your interpretation "in or out of control (and if the process is out of control, how might you, given the problem context, identify the root cause).