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The breaking strength of 20 test pieces of a certain alloy is given as under: 95,103,97,130,96,73,78,95,89,68,82,79,69,67,83,108,94,87,93,117 Calculate the percentage of the observations lying within

The breaking strength of 20 test pieces of a certain alloy is given as under: 95,103,97,130,96,73,78,95,89,68,82,79,69,67,83,108,94,87,93,117 Calculate the percentage of the observations lying within the limits * 2s and x 3s

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