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The lengths of power failures, in minutes, are recorded in the following table. 22 18 135 83 55 15 90 78 69 98 102

The lengths of power failures, in minutes, are recorded in the following table.22 18 135 15 90 78 69 9883 55 28 121 120 13

The lengths of power failures, in minutes, are recorded in the following table. 22 18 135 83 55 15 90 78 69 98 102 28 121 120 13 22 124 112 74 70 66 40 98 89 103 24 21 112 21 43 37 87 132 115 21 28 50 96 118 158 74 78 83 93 95 (a) Find the sample mean and sample median of the power-failure times. (b) Find the sample standard deviation of the powerfailure times.

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