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? You must show both explanation and the final answer.

(b) Develop X-bar Chart. In this case, the population standard deviation is 1.1 (sigma is 1.1). Determine UCL and LCL. You must show both explanation and the final answer.

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