ISO 13752:1998

Name: ISO 13752:1998
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Air quality — Assessment of uncertainty of a measurement method under field conditions using a second method as reference

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Referenced standards

ISO 6879:1995ISO 9169:1994

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ISO 13752:1998Loading preview...

ISO 13752:1998

Air quality — Assessment of uncertainty of a measurement method under field conditions using a second method as reference

ISO 13752:1998

Air quality — Assessment of uncertainty of a measurement method under field conditions using a second method as reference

Edition	1998
Published Date	1998
Published By	International Standardization Organisation
Page Count	15

a0, a1, a2 coefficients of the variance function
AQC Air Quality Characteristic
b0, b1 coefficients of the linear regression function or calibration function
F statistic F
k coverage factor
L likelihood
ln L logarithmic likelihood
N number of pairs (xi, yi)
N1, N2 number of pairs of subpopulation 1 and 2 respectively
P(yi) probability of residual at yi
ri residual at yi
s standard deviation of all values of AQC respectively
s, s0, s1, s2 standard deviation of a0, a1, a2 respectively
sb0, sb1 standard deviation of b0, b1 respectively
sx standard deviation (uncertainty) of the systematic error (bias)
U expanded uncertainty
xi variable of x-method at value xi
yi variable of y-method at value yi
x measured value of AQC
y measured value of AQC
ycor y-value after correction for the systematic error (bias)
systematic error (bias) at value xi
w random number from normal distribution with central value 0 and standard deviation 1
wi weighting factor at xi
xi' transformed value xi
yi' transformed value yi
xw mean and weighted mean of all values xi respectively
yw mean and weighted mean of all values yi respectively
xi-value after correction for the systematic error (bias)
s_x standard deviation of the measured xi
s_y standard deviation of the measured yi
s_x' transformed standard deviation as a function of AQC
s_y' standard deviation as a function of AQC and at value xi