Author Question: Larry's boat shop wants to monitor the number of blemishes in the paint of each boat. Construct a ... (Read 143 times)

roselinechinyere27m · **on:** Dec 3, 2019

Question 1

Ten samples of size four were taken from a process, and their weights measured. The sample averages and sample ranges are in the following table. Construct and plot an x-bar and R-chart using this data. Is the process in control?

Sample	Mean	Range
1	20.01	0.45
2	19.98	0.67
3	20.25	0.30
4	19.90	0.30
5	20.35	0.36
6	19.23	0.49
7	20.01	0.53
8	19.98	0.40
9	20.56	0.95
10	19.97	0.79

Question 2

Larry's boat shop wants to monitor the number of blemishes in the paint of each boat. Construct a 3-sigma c-chart to determine if their paint process is in control using the following data.

Sample Number	Number of Defects
1	3
2	4
3	2
4	1
5	3
6	2
7	1
8	4
9	2
10	3

essyface1 · **Reply #1 on:** Dec 3, 2019

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