Question

In a batch of 24 pedometers, 3 are believed to be defective. A quality control engineer randomly selects 4 units țo est Le random vara e·then m e among the 4 units tested. The probability mass function fx) P(Xx) is given below. defect eur s that are f(x) ((0,0.56324), (1,0.37549), (2,0.05929), (3,0.00198)) Recall that the mean μ of a discrete random variable with probability mass function f X-P Х-х ıs given by this number represent? f X Find for the probability mass function above. What does X : LI (Type an integer or decimal rounded to four decimal places as needed.) What does this number mean? O A. This is the probability that every 4 units tested will contain at least one defective unit. O B. This is the expected number of defective units for every 4 units tested. C. This is the exact number of defective units in every 4 units tested. O D. This is the average number of defective units in each batch of 24 units.

Answer 1

Answer:- Date:-26/04/2019 xf 0 0.56324 0.37549 0.05929 0.00198 0 0.37549 0.11858 0.00594 0.50001 Correct option: B. This is the expected number of defective units for every 4 units tested.