You are a quality engineer for a light manufacturing firm Yo

You are a quality engineer for a light manufacturing firm. You purchase two types of widgets from a supplier, 100 Milled and 120 Forged, and subject them to an inspection. 15 of the Milled and 10 of the Forged widgets fail the inspection. Conduct a Contingency Table Test on the results of the inspection to see if failure is independent of type. What is the Chi Square Statistic of the test?

Question 3 options:

2.28

2.92

2.51

2.39

2.61

2.41

	2.28
	2.92
	2.51
	2.39
	2.61
	2.41

Solution

Numbers 100 120 220 Defects 15 10 25 No def 85 110 195 Expected Defects 9.659091 12.5 No def 75.34091 97.5 85 110 Chi square 2.953209 0.5 1.238345 1.602564 4.191554 2.102564 6.294118