Managing for Quality and Performance Excellence 10th Edition by James Evans ,William Lindsay

Exercise 13

Note: Data sets for many problems in this chapter are available in the Excel workbook C06Data.xlsx on the Student Companion Site. Click on the appropriate worksheet tab as noted in the problem (e.g., Prob. 6-1) to access the data. In addition, the spreadsheet templates illustrated in the chapter are also available to aid in solving many of these problems.
The Turkalike Rug Company buys medium grade carpet in 100-foot rolls. The average number of defects per roll is 2.0. Assuming that these data follow a Poisson distribution, use the Poisson spreadsheet template to answer the following questions.
a. What is the probability of finding exactly 6 defects in a carpet roll chosen at random?
b. What is the probability of finding 3 or fewer defects in a carpet roll?