Question

A copy machine is available 24 hours a day. on a typical day, the machine produces 100 jobs. each job takes about 3 minutes on the machine, 2 minutes of which is processing time and 1 minute is setup time

Answer 1

(a)n = 1037
(b) assume 87%n= 469
-express the previous estimate, 95% as a decimal
p^= 0.05
n= [2.576]^2(0.95)(1-0.95)/0.06^2= 88
(c) does the additional survey information from part (b) have much of an effect on the sample size that is required?
yes, using the additional survey information from part (b) dramatically reduces the sample size