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A rating between 0 and 8 is awarded by identifying which one of the eight strips on the bluewool standard card has faded to the same extent as the sample under test. [4] [5] Zero denotes extremely poor colour fastness whilst a rating of eight is deemed not to have altered from the original and thus credited as being lightfast and permanent.
The top grade, A, is given here for performance that exceeds the mean by more than 1.5 standard deviations, a B for performance between 0.5 and 1.5 standard deviations above the mean, and so on. [17] Regardless of the absolute performance of the students, the best score in the group receives a top grade and the worst score receives a failing grade.
National Assessment of Educational Progress (NAEP); State achievement tests are standardized tests.These may be required in American public schools for the schools to receive federal funding, according to the US Public Law 107-110 originally passed as Elementary and Secondary Education Act of 1965, and currently authorized as Every Student Succeeds Act in 2015.
Thus, a score of 80 to 82 is a B−, a score 83 to 86 is a B and a score of 87 to 89 is a B+. The four-point GPA scale, the letter grade without variants is assigned to the integer. The "plus" and "minus" variants are then assigned to .3 above the integer and .3 below the integer, respectively.
APHA color, also referred to as the Hazen scale, and more appropriately as the Platinum Cobalt(Pt/Co) scale, [1] is a color standard named for the American Public Health Association and defined by ASTM D1209. [2] It was originally intended to describe the color of waste water, but its usage has expanded to include other industrial applications ...
The Standard Reference Method or SRM [2] is a system modern brewers use to measure colour intensity, roughly darkness, of a beer or wort. The method involves the use of a spectrophotometer or photometer to measure the attenuation of light of a particular wavelength, 430 nanometres (blue), as it passes through a sample contained in a cuvette of ...
Norm-referenced score interpretations compare test takers to a sample of peers. [4] The goal is to rank test takers as being better or worse than others. Norm-referenced test score interpretations are associated with traditional education. People who perform better than others pass the test, and people who perform worse than others fail the test.
For example, if the lightfastness of the colourant is indicated to be 5 on the Blue Wool scale, it can be expected to fade by a similar amount as the strip number 5 in the Blue Wool test strip set. The success of the test can be confirmed by comparing the test strip set with the reference set that was stored protected from the light. [12] [13]