І. Біхевіоралістський підхід

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Table A.1 - Types of distribution functions of the basic error.

Distribution function	The formulas for calculating the standard uncertainty of type В	casesof application
Rectangle		The documentation specified limits and boundaries of the input variable +, and the maximum value or range (± a) without specifying the distribution law and the confidence level.
acme	, at 0<β<1	1The documentation listed the maximum range (± a) symmetric distribution (without specifying the confidence level), in which the value of the input values ​​near the boundaries are less likely than those who are near the center.. 2. When the input value may be the sum or difference of two quantities, distributed equiprobably with different ranges.
Triangle		1. The limiting case of a trapezoidal distribution forβ=0. 2. The limiting case of trapezoidal raspredeKogda input value may be a sum or difference of two variables, distributed with equal probability with the same values ​​for diapazonovleniya.

Annex B

Table B.1 - Allocation of Student to determine the parameter (coefficient) tp