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Three chemical mixtures are compared in their stain removal effectiveness. Consider the test of whether the three mixtures differ in the stain removal effectiveness. Use

Three chemical mixtures are compared in their stain removal effectiveness. Consider the test of whether the three mixtures differ in the stain removal effectiveness. Use the data below to determine the test statistic for this test.

Effectiveness score	Mixture
112	1
90	1
107	1
94	2
72	3
69	3
87	3
78	2
112	2

none of these

3.34

2.07

1.79

2.65

3.91

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