Could three compounds deliver same median tread life

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In testing three different rubber compounds, a tire manufacturer finds the tread life of tires made from each to be as shown below. At the 0.05 level, could the three compounds deliver the same median tread life?

Design 1:	34	38	33	30	30 thousand miles
Design 2:	46	43	39	46	36
Design 3:	48	39	33	35	41

Reference no: EM131408773

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