1-

A quality analyst wants to construct a control chart for determining whether four machines, all producing the same product, are in control with regard to a particular quality attribute. Accordingly, she inspected 100 units of output from each machine in random samples, with the following results.

Machine	Total Defectives
#1	23
#2	15
#3	29
#4	13

For upper and lower control limits of .26 and .10, which machine(s), if any, appear(s) to be out-of-control for process proportion of defectives?

2-

A manager has the option of using any one of three machines for a job. The processes and their standard deviations are listed below. The specifications are 10.00 mm and 10.40 mm. Determine which machines are capable.

Process	Standard Deviation (mm)
A	0.09
B	0.04