Statistical Terms Glossary

When relating total revenues from fishing to total fishing effort in a surplus production model, the value of the largest positive difference between total revenues and total costs of fishing (including the cost of labour and capital) with all inputs valued at their opportunity costs.

The highest theoretical equilibrium yield that can be continuously taken (on average) from a stock under existing environmental conditions without significantly affecting the reproduction process. It is estimated using surplus production models (e.g. the Schaefer model) and other methods. In practice, however, MSY and the level of effort needed to reach it are difficult to assess.

The highest speed allowed on commercial service taking into account technical characteristics of the infrastructure.

Maximum sustainable yield refers to the maximum use that a renewable resource can sustain without impairing its renewability through natural growth or replenishment

The highest theoretical equilibrium yield that can be continuously taken (on average) from a stock under existing (average) environmental conditions without affecting significantly the reproduction process.

The mathematical average age of all the members of a population.

Average age at first marriage.

A measure of dispersion derived from the average deviation of observations from some central value, such deviations being taken absolutely, i.e. without reference to algebraic sign. The central value may be the arithmetic mean or the median. Expressed formally the mean deviation is the first absolute moment.

Mean hours actually worked per week are calculated by dividing the total number of hours actually worked per week by: (a) the total number of employee-held jobs during the same period, if the estimates are derived from an establishment survey; or (b) the total number of persons in employment (or employees) if the statistics are derived from a labour force survey.

A test that may be used under the axiomatic approach which requires that the price index lies between the minimum price relative and the maximum price relative.

A test that may be used under the axiomatic approach which requires that the implicit quantity index lies between the minimum and maximum rates of growth of the individual quantities.

Is a highly contagious disease caused by a virus, which usually results in a high fever and rash, and can lead to blindness, encephalitis or death.

Measurement errors occur when the response provided differs from the real value; such errors may be attributable to the respondent, the interviewer, the questionnaire, the collection method or the respondent's record-keeping system. Such errors may be random or they may result in a systematic bias if they are not random.

It includes remedial education, training or work practice for disadvantaged youth to facilitate transition from school to work. The principal target group usually consist of those who do not follow regular upper-secondary or vocational education and are unsuccessful in finding jobs.

Cutting with mechanized equipment such as a carrier-mounted shear or a feller-buncher instead of by hand with a power saw.

Mechanical treatment technology involves waste-water treatment of a physical and mechanical nature that results in decanted effluents and separate sludge.
Mechanical processes are also used in combination with biological and advanced unit operations. Mechanical treatment includes processes such as sedimentation and flotation

Insulated wagon either fitted with its own refrigerating appliance, or served jointly with other units of transport equipment by such an appliance (mechanical compressor, "absorption" unit, etc.).

A device that converts multimedia input into a backbone network and vice versa. A media gateway can be an IP gateway, a circuit switch (telephone switch) or a modem bank.

The median age is the age that divides a population into two numerically equal groups; that is, half the people are younger than this age and half are older

A process where two or more parties appoint a third-party neutral (“Mediator”) to help them in a non-binding dialog to resolve a dispute and/or to conclude the terms of an agreement (Herrberg, A., 2008). The role of the mediator is to facilitate the communication between the different parties, help them to focus on the real problems behind the conflict, and generate options that will satisfy the needs and benefits of the parties in concern.

Safe and effective non-surgical method of terminating early pregnancy using certain medications taken orally or through injections.