Dictionary » V » Variable

Variable

Definition

noun, plural: variables

(1) Something that varies or have no fixed quantitative value.

(2) A quantity that assumes a set of values.

(3) A factor that is subject to change

(4) (meteorology) A shifting wind, especially to distinguish from a trade wind.


adjective

(1) Likely to deviate or vary, as from the usual type; aberrant; inconstant; changeable.

(2) Capable of changing; alterable.


Supplement

A variable is a factor or a quantity whose value may vary in contrast to a constant whose value is fixed. A variable may be expressed in symbols whose value may change depending on the values of the other variables. For instance, in the expression: ax2, the variable here is (represented by) x (a is the coefficient).

Variables are used especially in experiments to determine if there is a probability of causal relationship between them. For example, an experiment is designed to see if a newly developed drug is effective in treating ill patients by giving some of them the drug while others the placebo. In this case, the variables are the treatments (i.e. drug or placebo) and their effects on the patients (i.e. recovery).


Word origin: from Latin variabilis "changeable," from variare "to change" Related forms: variability (noun)

Related terms:


Please contribute to this project, if you have more information about this term feel free to edit this page



Results from our forum


Re: Any ideas for vaccine development or anti-viral drugs???

... were conducted to assess enhancement of antiviral efficacy associated with PMO chemical modifications that included conjugation with peptides of variable length and composition, positioning of conjugated peptides to either the 5' or 3' terminus, and charge modifications conferred by addition ...

See entire post
by jonmoulton
Mon Sep 15, 2014 3:04 pm
 
Forum: Cell Biology
Topic: Any ideas for vaccine development or anti-viral drugs???
Replies: 2
Views: 476

holographic origin of life

... if these organisms are just random chemical reactions, their lifespan could be predicted as a result of multiple linear regression. The dependent variable y (or else the lifespan) would be: y=a+a1x1+a2x2+…….aνxν+aωxω+ε where ε is the error variable and x1,x2…xν the various explanatory variables ...

See entire post
by minasole
Wed Aug 28, 2013 5:15 pm
 
Forum: Evolution
Topic: holographic origin of life
Replies: 13
Views: 18267

ecological genomics: Microsallites & allele frequency

... studies have found that microsatellites might have phenotypic effects. In fact, my microsatellites data show some correlations with environmental variables. As you can see a table below, there are 19 alleles at this locus. Two alleles among them showed a significant correlations with an environmental ...

See entire post
by Young
Tue Jul 23, 2013 5:30 am
 
Forum: Genetics
Topic: ecological genomics: Microsallites & allele frequency
Replies: 0
Views: 874

Re: PCR

... When you are using 12 pairs of primers, they are targeting 24 different binding loci. Each forward and reverse pair spans a region that has a variable number of base pairs between individuals, but a given individual will have a definite base distance between each pair of primers (barring complications ...

See entire post
by jonmoulton
Tue Jan 29, 2013 4:16 pm
 
Forum: Genetics
Topic: PCR
Replies: 2
Views: 2887

PCR

... primers produces 12 bands from a single persons DNA. And why is the pattern of bands produced by multiplex PCR with the same 12 primers highly variable between individuals? What are the most likely explanations for individual D having less than 12 bands? Yours, Julian

See entire post
by Julian92
Mon Jan 28, 2013 12:23 pm
 
Forum: Genetics
Topic: PCR
Replies: 2
Views: 2887
View all matching forum results

This page was last modified 11:21, 16 July 2009. This page has been accessed 65,117 times. 
What links here | Related changes | Permanent link