Some General Results of Elementary Sampling Theory for Engineering Use

V E R Y day we base conclusions on the results of the process commonly known as " s a m p l i n g . " For example, if five times in a week a man has waited ten minutes or more for his trolley at a street corner, he may conclude that the transportation facilities are poor. Or again, if a housewife has bought ten loaves of bread at a certain store and has found five of them not as fresh as might be desired, she decides that in the future she will buy her bread elsewhere. Both of these conclusions are based on an intuitive application of sampling theory. Such examples could be multiplied indefinitely.