PMP Mock Test
Posted: Wed Oct 25, 2017 3:02 am
You are currently performing process analysis on your project and following the steps outlined in the process improvement plan to identify needed improvements. You have identified problems that have surfaced, constraints that have been encountered, and non-value-added activities on your project process execution. You are currently reviwing a sample of the results from your process analysis and you need to decrease your confidence interval for your measurements. What should you do regarding the sample size you have selected to decrese this confidence interval?
You should increase the sample size to decrease the confidence interval
You should decrease the sample size to decrease the confidence interval
You should keep the same sample size since it does not have any effect on the confidence interval
You should keep the same sample size but decrease the number of measurements in the sample
Could not understand question, hence no idea what should be exact answer. correct answer is A.
Tell me if these type of questions come in exam.
Re: PMP Mock Test
Posted: Wed Oct 25, 2017 3:10 pm
Its a good question and is a bit deep in Statistical area. I am not an expert in this area and cant really comment on it confidently
confidence level can be understood that how confident PM wants to be that the actual mean falls within PM confidence interval? confidence level can be 90%, 95% and 98%, it can be seen as probability
so in order for PM to decrease the confidence level we should increase the sample size , Increasing the sample size decreases the width of confidence intervals, because it decreases the standard error