When tested, the lives (in hours) of 5 bulbs were noted as follows: 1357, 1090, 1666, 1494, 1623. The mean deviations (in hours) from their mean is(a) 178 (b) 179 (c) 220 (d) 356

When tested, the lives (in hours) of 5 bulbs were noted as follows: 13

1.	When tested, the lives (in hours) of 5 bulbs were noted as follows: 1357, 1090, 1666, 1494, 1623. The mean deviations (in hours) from their mean is(a) 178 (b) 179 (c) 220 (d) 356
Answer» When tested, the lives (in hours) of 5 bulbs were noted as follows: 1357, 1090, 1666, 1494, 1623. The mean deviations (in hours) from their mean is (a) 178 (b) 179 (c) 220 (d) 356