Statistical interpretation of test results — Estimation of the mean — Confidence interval
Concerns the estimation of the mean of a normal population on the basis of a series of tests applied to a random sample of individuals drawn from this population when the variance of the population is unknown and calculation of the conficence interval for the population mean therefrom and from the standard deviation. Test method may be subject to systematic errors.
General methods of test for pigments and extenders — Part 22: Comparison of resistance to bleeding o...
Specifies a method for comparing the resistance to bleeding with that of an agreed sample. The method has been established because it is essentially a practical test and as such is probably of greater general value than other methods.
Green coffee — Olfactory and visual examination and determination of foreign matter and defects
Specification of methods for assessing conformity with a specification or a cotract. The methods specify samlping, the procedure and the evaluation of the examination. The principle of determination of foreign matter and defects consists in separating of foreign matter and defective beans into categories, and weighing and counting.
Concrete — Determination of tensile splitting strength of test specimens
Specifies a method for the determination of the tensile splitting strength of test specimens of hardened concrete. Describes test specimens, determination of apparent density, apparatus, test procedure, expression of results, and test report.
Fresh concrete — Determination of the consistency — Slump test
Specifies a method for determining the slump of fresh concrete both in the laboratory and in the field. The method is applicable to plastic and cohesive concrete. It is not applicable when the maximum size of aggregate is greater than 40 mm. Describes also apparatus, procedure, expression of results, and test report.
Aromatic hydrocarbons — Benzene, xylene and toluene — Determination of density at 20 degrees C
Specifies pyknometer and hydrometer methods. The principle of the pyknometer method bases on weighing an empty pyknometer, then filled with water and, finally, filled with the product under test at known temperatures. Calculation of the density from the values obtained applying certain corrections given in tables. The hydrometer method bases on the immersion of a hydrometer in the product under…
