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1 The life (in years) of a certain machine is a random variable with probability density function defined by f(x) = 5 + 2 vxB. Find the standard deviation of the distribution. The standard deviation is approximately years. (Round the final answer toC. Find the probability that a particular machine of this kind will last longer than the mean number of years. The probabilit

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mean : og by definition, 22를 ECO - Dino 452 ax 25 5 136 134 47 3 - 12.2627 51 ~ 12.69 * (*) Botte) 25 - 22 5 dza 5 134 17837

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