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Silicon wafers are being inspected for faults. The number of faults per wafer is distributed as a Poisson random variable with rate parameter =

  • Silicon wafers are being inspected for faults. The number of faults per wafer is distributed as a Poisson random variable with rate parameter λ = 4. i. What is the probability of observing 3 or more faults on a wafer? ii. Suppose that 5 wafers are sampled at random. What is the expected value and standard deviation of the total number of faults observed on the sampled wafers?



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