Use the table below to answer the questions for Assignment #7: Control Charts. This chart is also posted in the Quality pt. 2 slides.

	Package Weight
Sample	1	2	3	4	5	X	R
1	21	19	13	22	26
2	17	24	15	16	14
3	24	20	22	26	24
4	19	24	12	14	20
5	14	25	14	24	17
						X-Bar	R-Bar

Question 1

What is the X-Double Bar, or Grand Mean?

	Package Weight
Sample	1	2	3	4	5	X	R
1	21	19	13	22	26
2	17	24	15	16	14
3	24	20	22	26	24
4	19	24	12	14	20
5	14	25	14	24	17
						X-Bar	R-Bar

Group of answer choices

20.2

18.5

19.44

97.2

Question 2

What is the R-Bar, or average Range?

Group of answer choices

10.4

10

11

13.2

Question 3

What is the UCLr, or Upper-control limit for the R-Chart?

Group of answer choices

6

15.55

20

22

Question 4

What is the LCLr, or Lower-control limit for the R-Chart?

Group of answer choices

10.4

4.1

0

3.3

Question 5

Using the LCLr, UCLr, and R-Bar you calculated above, plot the R-Chart on a sheet of paper. Is it in control?

Group of answer choices

We don't have enough information to know if the R-chart is in control or not.

Yes

No

Question 6

What is the UCLx, or Upper-control limit for the X-Chart?

Group of answer choices

26

19.44

21.4

25.44

Question 7

What is the LCLx, or Lower-control limit for the X-Chart?

Group of answer choices

4.4

0

19.44

13.44

Question 8

Using the LCLx, UCLx, and X-Bar you calculated above, plot the X-Chart on a sheet of paper. Is it in control?

Group of answer choices

No

Yes

We need more information

Question 9

Given your conclusions about the X-Bar and R-Bar chart, is this process in control? Do changes need to be made to the process?

Group of answer choices

No it is not in control, changes should be made to the process at this time

Yes it is in control, no changes should be made at this time.