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Suppose that only 10% of all computers of a certain type experience CPU failure during the...

Suppose that only 10% of all computers of a certain type experience CPU failure during the warranty period. Consider a sample of 4,000 computers.

a. Can you use Poisson distribution as approximation for binomial? Why?

b. Compute ?(4 ≤ ? ≤ 6) (Use the formula of the pmf).

c. What are the expected and standard deviation values of the number of computers in the sample that have the defect?

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