Dependent and independent variables: Difference between revisions
Content deleted Content added
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
hello laura u k m8 |
|||
'''archielikesnapping'''!!!!!!!!!!!!!!!!!!In [[experimental design]] an '''independent variable''' is that [[variable]] which is KELSAAAAAAAAAAAAAAAAAaaa phenomenon (the [[dependent variable]]). In other words LAURA IS TO SHE HAS GOT HAIR AND EYES AND A NOSE , the experiment will attempt to find evidence that the values of the independent variable determine the values of the dependent variable. The independent variable can be changed as required, and its values do not represent a problem requiring explanation in an analysis, but are taken simply as given. |
|||
More generally, the independent variable is the thing that someone actively controls/changes; while the dependent variable is the thing that changes as a result. In other words, the independent variable is the "presumed cause", while dependent variable is the "presumed effect" of the independent variable. |
|||
This format is most used in Standard scientific experiments to help understand what is going on. |
|||
miss berry is a science teacher of yr 9 shes is very good archie is always tires he needs a nap in liddles |
|||
== Examples == |
|||
archielikesnapping!!!!!!!!!!!!!!!!!! |
|||
In a study of how different [[dosage]]s of a [[medication|drug]] are related to the severity of [[symptom]]s of a [[disease]], a researcher could compare the frequency and intensity of varying symptoms (the dependent variables) when varying dosages (the independent variable) are administered, and attempt to draw a conclusion. |
|||
The independent variable is also called the predictor variable. Independent variable is the most common name given for this item. |
|||
== Mathematics usage == RAV+C |
|||
When graphing a set of collected data, the independent variable is graphed on the ''x''-axis (see [[Cartesian coordinates]]). |
|||
In [[mathematics]], in [[functional analysis]], it was traditional to define the set of independent variables as the only set of variables in a given context which could be altered. For, even though any function defines a bilateral relation between variables, and it's even true that two variables might be connected by an implicit equation (for instance, cf. the definition of a circle, <math>x^2 + y^2 = R^2</math>), when computing derivatives it is nonetheless necessary to take a group of variables as "independent", or else the derivative has no meaning. |
|||
== See also == |
|||
* [[Attribute]] |
|||
* [[Social positivism]] |
|||
[[Category:Experimental design]] |
|||
[[Category:Econometrics]] |
|||
[[da:Uafhængige variabel]] |
|||
[[ru:Независимая и зависимая переменные]] |
|||
Revision as of 13:29, 23 May 2006
hello laura u k m8