Madhan Seduraman

Since nobody is answering my queries for quite long time. I am not being part of this blog. Thanks All Madhan

This can be a Lean savings or a Kaizen idea...this is not a GB project. Thanks Madhan

Can some one help with DMADV road map and the tools used in each phase? Thanks Madhan

i am eagerly waiting for it. Thanks VK.

Hi Universe of 2110 documents have to be sampled. Using the sample calculator, with 95% confidence level and 4% Margin Error the sample size arrived is 467. However, when I selected randomly 10% sample (211 documents), the sample mean and sample median is not too much deviating from the population mean and population median. The SE Mean is also very low (0.00787). Sample Mean - 2:08 (h:mm) - 2:07 is population mean. Sample Median - 1"04 (h:mm) - 1:04 is population median CI for Mean = 1:45 (h:mm) and 2:30 (h:mm). CI for Median = 0:47 (h:mm) and 1:16 (h:mm) My question is, considering this example, if 10% sample can have good representation of the population then how significant is the 467 sample size which came out of the sample size calculator of 95% CL and 4% CI? I am not sure if this question is limited to the example I have, but wanted to understand the concept. Please help. Thanks Madhan

but only issue is, it is very expensive to own it personally.

Wow, thats a great piece of information. Thank you.

You are right, I confused there. Thanks for your time and the explanation. It is pretty clear now. Regards Madhan

Can someone help me to understand the difference between the Margin Error and Confidence Interval? I understand that when the confidence interval increases sample size will be smaller and when the margin error increases sample size required will be higher. But I am curious to know what is the difference and interpretation between these two when we are looking at statistically signifcant samples. Thanks Madhan

Hi Madhavi Could you please provide the author name? I would like to buy this book, I am not finding enought information in Google. Thanks Madhan

Please help me about the sigma level accuracy calculation of a data sampling. I have a spread sheet gives me the calculation, but i would like to know how the calculation is done (shift and things like that). Please let me know any books or references on the same.