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Based on extensive testing, a manufacturer of washing machines believes that the distribution of the time (in...

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Statistics

Based on extensive testing, a manufacturer of washing machinesbelieves that the
distribution of the time (in years) until a major repair isrequired has a Weibull
distribution with alpa =2/3 and β=2.
a. What is the mean time until a major repair is required?
b. If the manufacturer guarantees all machines against a majorrepair for 1 year,
what proportion of all new washers will have to be repaired underthe
guarantee?

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