# Mean+average

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**Mean Reversion**— A theory suggesting that prices and returns eventually move back towards the mean or average. This mean or average can be the historical average of the price or return or another relevant average such as the growth in the economy or the average… …82

**mean free path**— noun : the average distance traversed between collisions by particles (as molecules of a gas or free electrons in metal) in a system of agitated particles called also free path * * * Physics, Chem. (in a collection of moving particles)the average …83

**Mean arterial pressure**— The mean arterial pressure (MAP) is a term used in medicine to describe an average blood pressure in an individual.[1] It is defined as the average arterial pressure during a single cardiac cycle. Contents 1 Calculation 2 Estimation …84

**average**— 1) A single number used to represent a set of numbers; mean. See arithmetic mean; geometric mean; median; weighted average 2) A partial loss in marine insurance (from French: avarie, damage). In general average (GA), a loss resulting from a… …85

**mean**— 1. v.tr. (past and past part. meant) 1 a (often foll. by to + infin.) have as one s purpose or intention; have in mind (they really mean mischief; I didn t mean to break it). b (foll. by by) have as a motive in explanation (what do you mean by… …86

**mean deviation**— noun the arithmetic mean of the absolute values of deviations from the mean of a distribution • Syn: ↑mean deviation from the mean • Topics: ↑statistics • Hypernyms: ↑deviation * * * noun …87

**Mean squared error**— In statistics, the mean squared error (MSE) of an estimator is one of many ways to quantify the difference between values implied by a kernel density estimator and the true values of the quantity being estimated. MSE is a risk function,… …88

**Mean effective pressure**— The mean effective pressure is a quantity related to the operation of an reciprocating engine and is a valuable measure of an engine s capacity to do work that is independent of engine displacement[1]. When quoted as an indicated mean effective… …89

**mean*/*/*/**— [miːn] (past tense and past participle meant [ment] ) verb [T] I 1) to have a particular meaning What does ‘maudlin mean?[/ex] The word ‘serviette means something different in French.[/ex] 2) to intend to communicate a particular meaning By… …90

**mean life**— Physics. 1. the average time that an unstable particle or nucleus survives before it decays. 2. See decay time. Also called average life, lifetime. * * * In radioactivity, the average lifetime of all the nuclei of a particular unstable atomic… …