The sample size is very important if we want to conduct a research of any interest. The larger the sample size it will make research results more accurate and reliable to the researcher.
Also to detect a statistical difference with a certain strategy require a larger sample size.
From the given options 80 is the maximum value , so it must be representing the largest sample size .
Therefore, the sample size of a population of 200 is most likely to give a reliable conclusion is 80.
