I did stats at university many years ago, so should know the answer to this one, but I burned/lost all my notes! I have been asked the following question:
"We maintain a database containing 'individuals', created of data fed from various systems, which has then been 'converged' and 'cleaned' to an individual level. In order to check the integrity of the data the client is planning to do a manual check.
What would you consider, from a QA perspective, to be an acceptable sample size of 'individuals' to be checked?"
Is there a simple answer?
Strive not to be a success, but rather to be of value - Albert Einstein.