variance

Also found in: Dictionary, Thesaurus, Legal, Financial, Idioms, Encyclopedia, Wikipedia.

deviation

[de″ve-a´shun]
1. a turning away from the regular standard or course.
2. in ophthalmology, strabismus.
3. in statistics, the difference between a sample value and the mean.
axis deviation an axis shift in the frontal plane, as seen on an electrocardiogram. There are three types: Left, from −30° to −90°; Right, from +90° to +180°; and Undetermined, which may be either extreme left or extreme right, from −90° to +180°.
conjugate deviation dysfunction of the ocular muscles causing the two eyes to diverge to the same side when at rest.
sexual deviation sexual behavior or fantasy outside that which is morally, biologically, or legally sanctioned, often specifically one of the paraphilias.
standard deviation (SD) the dispersion of a random variable; a measure of the amount by which each value deviates from the mean. It is equal to the square root of the variance. For data that have a normal distribution, about 68 per cent of the data points fall within (plus or minus) one standard deviation from the mean and about 95 per cent fall within (plus or minus) two standard deviations. Symbol σ.
ulnar deviation a hand deformity, seen in chronic rheumatoid arthritis and lupus erythematosus, in which swelling of the metacarpophalangeal joints causes the fingers to become displaced to the ulnar side. Called also ulnar drift. See illustration.
Ulnar deviation (ulnar drift) of the metacarpophalangeal joint, a characteristic sign of rheumatoid arthritis. From Pedretti and Early, 2001.

var·i·ance

(var'ē-ăns),
1. The state of being variable, different, divergent, or deviate; a degree of deviation.
2. A measure of the variation shown by a set of observations, defined as the sum of squares of deviations from the mean, divided by the number of degrees of freedom in the set of observations.

variance

/var·i·ance/ (var´e-ans) a measure of the variation shown by a set of observations: the average of the squared deviations from the mean; it is the square of the standard deviation.

variance

[ver′ē·əns]
Etymology: L, variare
1 (in statistics) a numeric representation of the dispersion of data around the mean in a given sample. It is represented by the square of the standard deviation and is used principally in performing an analysis of variance.
2
Usage notes: nontechnical.
the general range of a group of findings.

variance

A measure of the variability in a sample or population, which is calculated as the mean squared deviation (MSD) of the individual values from their common mean. In calculating the MSD, the divisor n is commonly used for a population variance and the divisor n-1 for a sample variance.

var·i·ance

(var'ē-ăns)
1. The state of being variable, different, divergent, or deviate; a degree of deviation.
2. A measure of the variation shown by a set of observations, defined as the sum of squares of deviations from the mean, divided by the number of degrees of freedom in the set of observations.

variance (s2)

(in statistics) the variation around the ARITHMETIC MEAN. It is calculated as the average squared deviation of all observations from their mean value. The square root of variance is the STANDARD DEVIATION

variance

one of the measures of the dispersion of data; the mean squared deviation of a set of values from the mean.

that portion of phenotypic variance which is due to the additive effect of genes (VA).
analysis of variance
a statistical method for comparing values, expressed in terms of means or variance, of one or more variables in several subgroups of a population. Called also anova.
that portion of phenotypic variance which is due to epistatic interactions (VI) and dominance deviations (VD).
non-genetic variance
that portion of phenotypic variance which is due to non-genetic effects such as environment (VE).
phenotypic variance
a measure of the extent to which individuals vary in their phenotype (VP). VP = VA + VD + VI + VE.
variance ratio distribution
References in periodicals archive ?
The covariance matrix of random regression coefficients for additive genetic and permanent environmental effects with the percentage of variance explained by eigenvalues associated with RRM matrix for these effects in the LE33het10 model are presented in Table 4.
It is important to mention that in Miller (1996) the variance of d' was calculated using the parametric probabilities of false alarms and hits; on the contrary, in Kadlec (1999) the variance of d' following Gourevitch and Galanter was calculated using the proportions of false alarms and hits.
Bias and Mean square error of ratio type variance estimator was (Eq.
Convergence was assumed when the variance of likelihood values in the simplex was less than 10-8.
Variance futures replicate the pay-off profile of a variance swap using a daily-margined futures contract.
As a result, the request for the variance was denied.
Materials Price Variance (isolated at time of purchase):
DA PAM 750-8 ALLOWS THE 10 PERCENT VARIANCE BEFORE OR AFTER THE SCHEDULED SERVICE DATE.
This intentional omission amplifies the point that the expected relationships among EQC, EAC, NC, and PC have significant volume variance implications that you should anticipate before you actually use the capacity.
Material price variance for ingredient A Actual cost of 35,000kg: 35,000kg x \$26/kg \$910,000 Standard cost of 35,000kg: 35,000kg x \$23/kg \$805,000 Material price variance \$105,000 (A) Material usage variance for ingredient A Actual output did use 35,000kg Actual output should have used: 9,000 units x 4kg 36,000kg Operational usage variance 1,000kg (F) Material usage variance: 1,000kg x \$23/kg \$23,000 (F)
05, hence, we cannot assume equal variances, and the t value is 5.
A variance is a regulatory action that permits an employer to deviate from the requirements of an OSHA standard under specified conditions.

Site: Follow: Share:
Open / Close