A group which have been deliberately chosen from a population. Non-random sample Random error Difference between one measurement and the mean of all the measurements. The difference between the smallest and the greatest value. Variation Reliability Repeatability. It shows how nearly the same are the repeated measurements of the same thing.
Low reliability is the same as a large random variation or random error.
When the study of new cases no more brings new knowledge to the researcher, the data is said to be saturated and no more material needs to be collected. It gives the probability that the measurements made from a random sample are true also in the population. A method of describing the dispersion of measurements around their mean. The square root of variance. An arrangement for judging and implementing the proposals made by employees.