Referring to Exercise 4.92, The cost of repairing the flaw in the copper wire is $8 per flaw. Find the mean and the standard deviation of the distribution of repair costs for a 10-meter length of wire in question.

 

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4.92 A certain type of copper wire has a mean number of 0.5 flaws per meter. a Justify using the Poisson distribution as a model for the number of flaws in a certain length of this wire. b Find the probability of having at least one flaw in a meter length of the copper wire. Find the probability of having at least one flaw in a 5-meter length of the copper wire. 4.92 A certain type of copper wire has a mean number of 0.5 flaws per meter. a Justify using the Poisson distribution as a model for the number of flaws in a certain length of this wire. b Find the probability of having at least one flaw in a meter length of the copper wire. Find the probability of having at least one flaw in a 5-meter length of the copper wire.