How many samples are needed for statistics?
Everyone knows that the results of inferential statistics carry a margin of error. What is sample size determination? This represents the act of choosing the number of observations or replicates to include in a statistical sample. There are some methods to follow. For example, lowering the level of confidence will give us a smaller margin of error. On the other hand, increasing the sample size will always decrease the margin of error. There are also other determinant factors to consider – costs or feasibility.