A quality analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past experience that when the process is operating as intended, the packaging process has a standard deviation of one ounce. Each day last week, he randomly selected four packages and weighed each. The data from that activity appear below.

Day	Package 1	Package 2	Package 3	Package 4
Monday	23	22	23	24
Tuesday	23	21	19	24
Wednesday	20	19	20	23
Thursday	18	19	20	22
Friday	18	20	22	20

1. Assume this process is In Control. Which of the following shows the Process Capability if the specifications are at 20.8 2.2?

A) 1

B) 1.33

C) 1.6

D) 1.46

E) 1.5

F) None of the above (What is your answer?)

2. Assume process standard deviation is not known and process is In Control. Which of the followings show the Process Capability if the specifications are at 21 5? A) 1

B) 1.33

C) 1.6

D) 1.46

E) 0.9

F) None of the above (What is your answer?)

3. Which of the followings show the appropriate control chart we can develop for this process?

A) P-Chart

B) Np-Chart

C) X-bar Chart

D) R Chart

E) X-bar and R Chart

F) None of the above (What is your answer?)