From PM Simulator I got this tricky question..

You are currently performing process analysis for your peoject and you are folowing the steps outlined in the process improvement plan to ide ntify needet improvements. You are examining problems that have surfaced, constraints experienced, and non-value-added activities identified during process execution. You are analyzing a sample of readings from the processes. If you need to decrease your confidence intervale for your measurements, what should you do regarding the sample size you have selected.

a. you should increase the sample size to decrease the confidence interval

b. you should decrease the sample size to decrease the confidence interval

c. you should keep the same sample size since it does not have any effect on the confidence interval.

d. you should keep the same sample size but decrease the number of measurements in the sample..

I did not read about that kind of stuff in PMBOK,  does the PMP Exam have that kind of thing ?

anyone ?