2. Now you are planning to replace the old X-Ray machine described in Question 1 with a new X-Ray machine. The average natural process (admission) time of the new machine is also 5 minutes with a standard deviation of 3 minutes. However, the new machine requires setups. The average setup time is 40 minutes with a standard deviation of 10 minutes. Assume that the new machine can screen 100 trauma patients between setups.

a) What is the natural squared coefficient of variation for one patient?

(b) What will be the effective mean and coefficient of variation of the admission time for a group of 50 trauma patients? (Hint: Ns is 2 since the new machine can screen two groups of size 50. Also, use your answers for Question 1-Part b to identify the value of t0 and 0.) te: __________ e2: __________ ce2: ___________

(c) In two sentences, describe how the manager of center can improve the inflated effective admission time in Part b?

(d) Based on your calculation, what will be your decision? Replacing the old X-RAY machine with the new one or keeping the old machine? Why? (Hint: Assume that the center has no budget constraint.)

I got A. I just need B,c, and D