Statistical Terms Glossary

A length frequency distribution is an arrangement of recorded lengths (in a total catch, a stock, or a sample) which indicates the number of individuals encountered in each length interval.

The number of individuals of a catch or catch sample in each length interval. The modal size is the length group with the higher number of individuals. Distributions may be uni- or bi-modal but are more generally multi-modal, reflecting multiple age-groups.

The total length of railway lines operated for passenger transport, goods transport, or both.

The length of the road is the distance between its start and end point.
Note: If one of the directions of the carriageway is longer than the other then the length is calculated as the sum of the two halves of the distances of both directions of the carriageway from first entry point to last exit point.

The distance measured in meters in a straight line on a line parallel to the design waterline between the foremost point of the bow and the aftermost point of the stern.

Main roads, secondary roads, rural roads and border roads,  These roads are outside the centres of districts, outside the boundaries municipalities of  governorates and outside the borders of the minority of Baghdad, working on the law 35

The columns of the Leontief inverse (input-output) table show the input requirements, both direct and indirect, on all other producers, generated by one unit of output.

A method of describing sound levels that vary over time, resulting in a single decibel value which takes into account the total sound energy over the period of time of interest.
- Noise level: a physical scale for the description of environmental noise, which has a relationship with a harmful effect, expressed in decibels (dB).
The standard noise level indicators are:
- Lden (day-evening-night noise indicator): for overall annoyance;
- Lday (day-noise indicator): for annoyance during the day period;
- Levening (evening-noise indicator): for annoyance during the evening period;
- Lnight (night-time noise indicator): for sleep disturbance.

Lesbian women are attracted to individuals of the same sex as themselves.

Irrational fear of, and aversion to, lesbians.

The person or entity who owns the property and who receives rent or lease payments from another (lessee) to use the property.

A written instrument issued by A, where A agrees to make every effort to assure B's compliance with the terms of a contract, but without committing A to perform B's obligation in the event that B is unable to fulfil his obligation. Usually issued by a parent company on behalf of a subsidiary in another country.

Letter from the Government of a country receiving a structural adjustment loan to the President of the Bank, setting out the Government's medium-term objectives for structural change and the range of measures that it intends to take over several years to achieve these objectives.

Letter from the Government of a country receiving a structural adjustment loan to the President of the Bank, setting out the Government's medium-term objectives for structural change and the range of measures that it intends to take over several years to achieve these objective.

Letters of credit are promises to make payment only when certain documents specified by contract are presented.

The level annuity system entails equal aggregate payments of principal and interest (i.e. with principal repayments made in gradually ascending amounts). This system was used by the World Bank prior to 1975.

Any accident at level crossings involving at least one railway vehicle and one or more crossing vehicles, other users of the road such as pedestrians or other objects temporarily present at or near the track. Level crossing: Any level intersection between a road and a railway, as authorized by the infrastructure manager and open to public or private road users. Passages between platforms within stations are excluded; Road: For the purpose of Rail Accidents Statistics, any public or private road, street or highway, including footpaths and bicycle lane.

See Funding level