| PSD | particle size distribution; peptone, starch, and dextrose; periodic synchronous discharge; phase-sen... |
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| 'Greek letter alpha' | angular acceleration; first [carbon atom next to the carbon atom bearing the active group in organic... |
| beta [Greek letter beta] | an anomer of a carbohydrate; buffer capacity; carbon separated from a carboxyl by one other carbon i... |
| CPF | clot-promoting factor; complication probability factor; contraction peak force; current patient file... |
| CPS | carbamoylphosphate synthetase; cardioplegic perfusion solution; centipoise; cervical pain syndrome; ... |
| probability density function | |
| NTCP | Normal Tissue Complication Probability |
| P | Probability |
| Ps | Probability of Survival |
| SPRT | Sequential Probability Ratio Test |
| personal probability | An idiosyncratic judgment about the outcome of an event; it may include evidence too subtle to be disposed of in a subjective probability. (05 Mar 2000) |
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| conditional probability | A probability quoted when the range of choices admitted is restricted, i.e., conditional; thus, the probability of the child of a colour-blind man inheriting the gene is 1/2 if the child is female and almost zero if the child is male. (05 Mar 2000) |
| positional probability | <chemistry> A type of probability that depends on the number of arrangements in space that yield a particular state. (09 Jan 1998) |
| posterior probability | The best rational assessment of the probability of an outcome on the basis of established knowledge modified and brought up to date. Compare: Bayes theorem. (05 Mar 2000) |
| prior probability | The best rational assessment of the probability of an outcome on the basis of established knowledge before the present information is included. For instance, the prior probability of the daughter of a carrier of haemophilia being herself haemophiliac is 1/2. But if she already has one child, an affected son, the posterior probability that she is a carrier is unity, whereas if she has one child, a normal one, the posterior probability that she is a carrier is 1/3. See: Bayes theorem. (05 Mar 2000) |
| probability | Origin: L. Probabilitas: cf. F. Probabilite. 1. The quality or state of being probable; appearance of reality or truth; reasonable ground of presumption; likelihood. "Probability is the appearance of the agreement or disagreement of two ideas, by the intervention of proofs whose connection is not constant, but appears for the most part to be so." (Locke) 2. That which is or appears probable; anything that has the appearance of reality or truth. "The whole life of man is a perpetual comparison of evidence and balancing of probabilities." (Buckminster) "We do not call for evidence till antecedent probabilities fail." (J. H. Newman) 3. <mathematics> Likelihood of the occurrence of any event in the doctrine of chances, or the ratio of the number of favorable chances to the whole number of chances, favorable and unfavorable. See 1st Chance. Synonym: Likeliness, credibleness, likelihood, chance. Source: Websters Dictionary (01 Mar 1998) |
| probability curve | A graph of the gaussian (normal) distribution representing relative probabilities. (05 Mar 2000) |
| probability learning | Usually refers to the use of mathematical models in the prediction of learning to perform tasks based on the theory of probability applied to responses; it may also refer to the frequency of occurrence of the responses observed in the particular study. (12 Dec 1998) |
| probability sample | Each individual in the sample has a known, generally equal, chance of being selected. (05 Mar 2000) |
| probability theory | The branch of mathematics dealing with the purely logical properties of probability. Its theorems underlie most statistical methods. (12 Dec 1998) |
| subjective probability | A fair statement of the odds that a rational, well-informed person would give or take for the outcome of an experiment. The experiment may be unique and not rationally understood (precluding both theoretically sound predication and empirical experience). The formulation is applicable to experiments that have been carried out but the outcome unknown. (For instance, a certain statement about the sex of the foetus early in pregnancy is established but perhaps not accessible until amniocentesis can be done.) Unlike personal probably, the subjective probability should be the same from all competent counselors in possession of the same evidence. (05 Mar 2000) |
| objective probability | A probability of an outcome based either on unassailable theory or extensive empirical experience of exactly the same combination of circumstances; the notion also implies that the realization concerned has not been effected and therefore even in principle not known with certainty. (05 Mar 2000) |
| transition probability model | A model to account for the apparently random variation in cell cycle time between individual animal tissue cells in culture that postulates that transition from G1 to s phase is probabilistic. Contrasts with hypotheses that require the accumulation of critical levels of particular proteins. (18 Nov 1997) |
| joint probability | The probability that two or more outcomes are realised jointly; the probability that the child is both male and affected is 1/4. (05 Mar 2000) |
| bone density | Bone density is the amount of bone tissue in a certain volume of bone. It can be measured using a special X-ray called a quantitative computed tomogram. (12 Dec 1998) |
| probability density function |
In mathematics, a probability density function (pdf) serves to represent a probability distribution in terms of integrals. Any function that is everywhere non-negative and whose integral from −∞ to +∞ is equal to 1 is a probability density function. If a probability distribution has density f(x), then intuitively the infinitesimal interval [x, x + dx] has probability f(x) dx. ...
Ãâó: en.wikipedia.org/wiki/Probability_density_function
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| probability density function |
(Or density function; also called frequency function.) The statistical function that shows how the density of possible observations in a population is distributed. It is the derivative f(x) of the distribution function F(x) of a random variable, if F(x) is differentiable. Geometrically, f(x) is the ordinate of a curve such that f(x)dx yields the probability that the random variable will assume some value within the range dx of x. ...
Ãâó: amsglossary.allenpress.com/glossary/browse
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| probability density f. |
in statistics, a mathematical function that describes the distribution of measurements for a population; a curve that describes a population. Its integral is the cumulative distribution function, so the probability that an individual measurement will fall between two numbers a and b is equal to the proportion of the area under the curve between points a and b, with the entire area under the function being 1.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| probability density function |
A relative frequency curve which shows the total area (100 percent) of all data points contained in the distribution.
Ãâó: www.fta.dot.gov/library/planning/prob/glossary.htm...
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