Question: Sampling 9 boxes per every hour for the past 8 hours has produced the following results: WEIGHT OF SAMPLE WEIGHT OF SAMPLE HOUR (AVG. OF

Sampling 9 boxes per every hour for the past 8 hours has produced the following results:

WEIGHT OF SAMPLE

WEIGHT OF SAMPLE

HOUR

(AVG. OF 9 BOXES)

HOUR

(AVG. OF 9 BOXES)

1

16.1

5

16.3

2

16.8

6

14.8

3

15.5

7

14.2

4

16.4

8

17.3

(a) What is the value of X bar bar (X double bar)? Show all your work.

(b) Develop X Chart. In this case, =1.3. Determine UCL and LCL. Show all your work.

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