What is the average run length

Assignment Help Basic Statistics

Reference no: EM131769167

Qusetion: In the context of Exercise, suppose that after five interruptions the process undergoes a major evaluation. Suppose also that inspections happen once every week. Let Y denote the number of weeks between successive major evaluations.

(a) The random variable Y is (choose one)

(i) binomial

(ii) hypergeometric

(iii) negative binomial

(iv) Poisson.

(b) Find the expected value and variance of Y.

Exercise: Average run length. To control the quality of a manufactured product, samples of the product are taken at specified inspection time periods and a quality characteristic is measured for each product. If the average measurement falls below a certain predetermined threshold, the process is declared out of control and is interrupted. The number of inspections between successive interruptions of the process is called a run length. The expected value of the random variable X = run length is called the average run length. Suppose the probability that an inspection will result in the process being interrupted is 0.01.

(a) The random variable X is (choose one)

(i) binomial

(ii) hypergeometric

(iii) negative binomial

(iv) Poisson.

(b) Give the sample space and PMF of X.

Reference no: EM131769167

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