Chapter 6, Problem 85H

A NUMMI assembly Line, which has been operating since 1984, has built an average of 6.000 cars and trucks a week. Generally, 10% of the car’s were defective coming off the assembly line. Suppose we draw a random sample of n 100 cars. Let X represent the number of defective cars In the sample. ‘What can we say about X In regard to the 68-95-99.7 empirical rule (one standard deviation, two standard deviations and three standard deviations from the mean are being referred to)? Assume a normal distribution for the defective cars in the sample.