Question: A random sample is selected from each of 3 makes of ropes and their breaking strength (in certain units) are measured with the following results:

A random sample is selected from each of 3 makes of ropes and their breaking strength (in certain units) are measured with the following results:

I 70, 72, 75, 80, 83

II 60, 65, 57, 84, 87, 73

III 100, 110, 108, 112, 113, 120, 107

Test whether the breaking strengths of the ropes differ significantly.

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