# degrees of freedom

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## de·grees of free·dom (d.f.),

in statistics, the number of independent comparisons that can be made between the members of a sample (for example, subjects, test items and scores, trials, conditions); in a contingency table it is one less than the number of row categories multiplied by one less than the number of column categories.

## degrees of freedom (df)

a statistical measure of the number of independent observations or choices among members in a sample. It is used in determining the statistical significance of findings during data analysis.

## de·grees of free·dom

(dĕ-grēz' frē'dŏm)
1. The number of planes (e.g., one, two, or three) within which a joint can move.
2. The variety of possible movement combinations that can occur within a segment of the human body.

## degrees of freedom (df)

the number of unrestricted variables in a frequency distribution, a factor that is of great importance in statistical testing. For example, in a simple CHI-SQUARED TEST the number of degrees of freedom is one less than the number of classes (types) of individuals, one d.f. having been lost due to the assumption that a certain proportion of each class is expected. Thus in testing a 9:3:3:1 ratio there are three degrees of freedom.

## de·grees of free·dom

(dĕ-grēz' frē'dŏm)
In statistics, number of independent comparisons that can be made between the members of a sample.

## degrees of freedom

used to define statistical distributions of several tests, usually based on the number of data items less the number of parameters estimated.
References in periodicals archive ?
Parametros geometricos de la interfaz Haptic 6DOF j [sigma]j [alfa]j dj [theta]j rj 1 0 0 0 [theta]1 0 2 0 90 0 [theta]2 0 3 0 0 D3 [theta]3 0 4 0 -90 0 [theta]4 R4 5 0 90 0 [theta]5 0 6 0 -90 0 [theta]6 0 Fuente: elaboracion propia.
The automotive controller drives applications such as four--to eight-post test systems, 6DOF suspension test rigs or simulation tables, and durability and fatigue tests.
However, hexapods and orthogonal 6DOF machines are more complex and expensive than a traditional single-axis shaker, and so are the controllers.
pose] for registering 6DOF data using both the positional and rotational parts of data is defined as in (1), with [E.
GT] which was used to generate a secondary 6DOF data in (21), i.

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