TERMIUM Plus^®

Record 1,  Textual support,  French

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

The operation made for the purpose of estimating the variance of a population or of a probability distribution considered as representing this population.  2, record 2, English, - estimation%20of%20the%20variance%20of%20a%20population

Record number: 2, Textual support number: 1 OBS

1. An unbiased estimator of the variance of a probability distribution obtained from a sample of n independent observations is obtained by dividing by n-1 the sum of the squares of the deviations of the observed values from the arithmetic mean of this sample. 2. The positive square root of the unbiased estimator of the variance is often used as an estimator of the standard deviation. However, it ought to be noted that this estimator is not unbiased.  3, record 2, English, - estimation%20of%20the%20variance%20of%20a%20population

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Opération ayant pour but d’estimer la variance d’une population, ou de la loi de distribution considérée comme représentant cette population.  3, record 2, French, - estimation%20de%20la%20variance%20d%26rsquo%3Bune%20population

Record number: 2, Textual support number: 1 OBS

1. Un estimateur sans biais de la variance d’une loi de probabilité à partir d’un échantillon de n observations indépendantes s’obtient en divisant par n 1 la somme des carrés des écarts des valeurs observées par rapport à la moyenne arithmétique de cet échantillon. 2. La racine carrée positive de l'estimateur sans biais de la variance est souvent utilisée comme estimateur de l'écart-type. Il faut noter pourtant que cet estimateur n’ est pas sans biais.  3, record 2, French, - estimation%20de%20la%20variance%20d%26rsquo%3Bune%20population

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

A set of data which has been grouped, or classified, according to some quantitative or qualitative characteristics; that is, data which have been put into a frequency distribution.  1, record 3, English, - grouped%20data

Record number: 3, Textual support number: 1 OBS

Although the grouping process generally destroys much of the original detail of the data, an important advantage is gained in the clear "overall" picture which is obtained and in vital relationships which are thereby made evident.  2, record 3, English, - grouped%20data

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 CONT

Données groupées.(...) si une valeur est répétée plusieurs fois, ce qui est toujours le cas(...) lorsque les données sont groupées, il faut compter autant de fois son écart quadratique, ce qui revient à multiplier les écarts quadratiques par la fréquence F [pour calculer la variance]  1, record 3, French, - donn%C3%A9es%20group%C3%A9es

Record 3,  Textual support,  Spanish