Shift Morning Evening Overnight Total Defect Type A 43 17 14 74 Defect Type B 36 49 22 42 127 Defect Type C 56 29 14 99 Total 135 95 70 300

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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A quality control manager has concerns about the occurrence of defects on a
component assembly used in the fabrication of an aircraft wing. The manufacturing plant
operates with three shifts, and three particular types of defects are of concern. The following
table shows the count of defects of each type across the shifts from a random sample of 300
assemblies with defects from a week of production.
Test whether the types of defects are independent of the shifts. Perform the test on the 5%
level. What is your conclusion?


Shift
Morning
Evening
Overnight
Total
Defect Type
A
43
17
14
74
Defect Type
B
36
49
42
127
Defect Type
C
56
29
14
99
Total
135
95
70
300
Transcribed Image Text:Shift Morning Evening Overnight Total Defect Type A 43 17 14 74 Defect Type B 36 49 42 127 Defect Type C 56 29 14 99 Total 135 95 70 300
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