Exponential and Poisson prediction. Fifty-eight fans in service Predict the number of such fans that will fail in the next 2000 hours of service on each fan; assume that failed fans are replaced by a fan with a new design that does not fail. Do
(A)Predict the number of such fans that will fail in the next 2000 hours of service on each fan; assume that failed fans are replaced by a fan with a new design that does not fail
(B)Do (a), but assume that each failed fan is immediately replaced by a fan of the old design
(C) For (a), calculate a limit that is above the observed number of failures with 90% probability
(d) For (b), do (c).