For quality control purposes, a company that manufactures sim chips for cell/smart phones routinely takes samples from its production process.Since it is important that these chips are nearly fault free, one inspection check involves using microscopic equipment to count the number of imperfections on each chip.Suppose the average number of imperfections per 1000 sim chips is 3.What is the probability that a sample of 1000 sim chips has 2 imperfections?
A)0.2240
B)0.4232
C)0.2510
D)0.4591
E)0.1365

Question

Quizplus · Accepted Answer

The problem follows a Poisson distribution with λ = 3. The probability of observing 2 imperfections is given by P(X=2) = (e^(-3) * 3^2) / 2! = 0.2240.

For Quality Control Purposes, a Company That Manufactures Sim Chips