NUMBAT OER - Open Educational Resources

2. Statistical precision and accuracy

One of the basic activities in statistics is assessing whether the answer derived from a small number of observations (a sample) is representative of the much larger number of entities (the population) from which the sample has been drawn. It is most unlikely that either the sample or the population will be uniform – each will have an average value (typically a mean) and measurements will vary around this mean. The average and variability define precision and accuracy.