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Author: admin - Date: August 23, 2008 - Category: Health

000 and = 1 %), is easy to calculate magnitude of takeoff (in this case it is equal 20,4 %). From the given formula it is visible, that magnitude of mean error appreciably depends on the second part of the formula And - - ^J. Error changes in connection with change - are introduced to a trace, a view: N 0,1 0,2 0,3 0,4 0,5 1-3,00 2,00 1,53 1,22 1,00 ~ ‘ N 0,5 0,7 0,8 0,9 1,0 1 ~~ 1\ 0,81 0,65 0,50 0,33 0,00 In other words, with augmentation of sample from 10 % to 20 % the mean error decreases in two third; if sample is incremented to 30 % the mean error decreases, approximately, half and besides, at. At formation of magnitude of sample it is necessary to reckon with a general totality absolute value, the probable error of the centre decreases in the attitude inversely proportional to square root from among taken unities; at augmentation of number of observation in 4, 9, 25 and time, reliability of effects increases only in 2, 3, 5 and time. Practically it means, that at general totality increase it is possible to be satisfied concerning a smaller sample. and to and a h with to about and the h and streams, . . , From this, that it is a method not continuous and a method strictly statistical (grounded on the law of major numbers), its type, instead of a substitute of a statistical method. The economy of forces, resorts is bound to application and time that is especially valuable there where carrying out of continuous examinations it it is impossible on objective requirements (epidemies, hunger-strikes).