“level”的概念、定义、翻译、参考文献-科学参考

level

Physics

An instrument used in surveying to determine heights. It usually consists of a telescope and attached spirit level mounted on a tripod. The level is set up between a point of known height and a point for which the height is required. Before use it is adjusted until the line of sight is exactly horizontal. Sightings are then made onto a graduated levelling staff at the two points. The difference in elevation between the two points can then be calculated from the readings taken at these points.

Statistics

1. In significance testing (see hypothesis test), the designated probability for rejection of the null hypothesis—the significance level (e.g. 5%).
2. In experimental design, the category of a treatment (typically, in a 2ⁿ factorial experiment (see factorial design), reference is made to upper and lower levels of a treatment).

Computer

of a node in a tree. A numerical value equal to one greater than the depth of the same node. The level of the root node is thus one; the level of any other node is one greater than that of its parent. In some texts, the term level is used as a synonym for depth.

单词	level
释义	level Physics An instrument used in surveying to determine heights. It usually consists of a telescope and attached spirit level mounted on a tripod. The level is set up between a point of known height and a point for which the height is required. Before use it is adjusted until the line of sight is exactly horizontal. Sightings are then made onto a graduated levelling staff at the two points. The difference in elevation between the two points can then be calculated from the readings taken at these points. Statistics 1. In significance testing (see hypothesis test), the designated probability for rejection of the null hypothesis—the significance level (e.g. 5%). 2. In experimental design, the category of a treatment (typically, in a 2ⁿ factorial experiment (see factorial design), reference is made to upper and lower levels of a treatment). Computer of a node in a tree. A numerical value equal to one greater than the depth of the same node. The level of the root node is thus one; the level of any other node is one greater than that of its parent. In some texts, the term level is used as a synonym for depth.
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