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 1,000 units of output from each machine in random samples, with the following results: Machine Total Defectives #1 #2 #3 #4 For upper and lower control limits of .026 and .014, which machine(s), if any, appear(s) to be out-of-control for process proportion of defectives? machine #3 machine #4 machines #3 and #4 machines #2 and #3 23 15 29 13 none of the machines

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 1,000 units of output from each machine in random samples, with the following results: For upper and lower control limits of .026 and .014 , which machine(s), if any, appear(s) to be out-of-control for process proportion of defectives? machine \#3 machine \#4 machines #3 and #4 machines #2 and #3 none of the machines