Glossary Term
Interquartile Range
The difference between the 3rd and 1st quartiles is called the interquartile range and it is used as a measure of variability (dispersion).
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Glossary Term
The difference between the 3rd and 1st quartiles is called the interquartile range and it is used as a measure of variability (dispersion).
Glossary Term
The largest difference between, or ratio of, an instrument's or method's highest and lowest value in a set, such as pixel (voxel) values in an image.
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The difference between the lowest and highest numerical values; the limits or scale of variation.
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A set of values of particular type of measurement that is used to interpret corresponding observation results.
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A range of values for a parameter that may contain the parameter and the degree of confidence that it is in fact there.
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Validation evidence that an assay detects the range of variants, genotypes, or serotypes it claims to cover. For evolving targets such as influenza or SARS-CoV-2, inclusivity statements carry a validation date and should be checked against circulating variant lists at procurement time.
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Any transmissible change in the genetic material of an organism, which can result from radiation, viral infection, transposition, treatment with mutagenic chemicals and errors during DNA replication or meiosis. The effects of mutation range from single base changes to loss or gain of complete chromosomes. As many of the simpler alterations to DNA may be repaired, such changes are only heritable once the change is fixed in the DNA by the process of replication. Mutations may be associated with genetic diversity or with pathologies including cancer.
Glossary Term
A measure of the range of values in a set of numbers. Standard deviation is a statistic used as a measure of the dispersion or variation in a distribution, equal to the square root of the arithmetic mean of the squares of the deviations from the arithmetic mean.
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Any of four equal-sized sets of observations in a ranked sample.
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Complementary precision measures: repeatability is variation under the same conditions (same operator, equipment, short interval); reproducibility is variation across conditions — different days, operators, lots, or laboratories.