Monday, January 18, 2010

What is the difference between an independant variable, dependant variable and control?

You are asking about a closed-loop control system, for those terms to be applicable.





The independent variable is the input to the control system, basically, a setpoint change, or a load change, aka, disturbance.





The dependent variable is any output of the control system, i.e. flow, temperature, pressure, level, etc.





The control variable is the dependent variable right after the controller, into the control element, ie, flow control valve, heater, etc.What is the difference between an independant variable, dependant variable and control?
indpent varible: this one is x: the varible you can change (ie: amount of sunlight)


depent varible: this one is y: the varbile you can't change (ie: time)


control, aka constent: stays the same throught out the expirment





example: say you want to seee if different colour light a/effects the way ablino corn grows.


control: corn


d. v.: time it takes to grow


i. v.: colour light





*you compare the iv to the constant!*


*you can't change the dv by laws of science*





HOPE THIS HELPED!What is the difference between an independant variable, dependant variable and control?
The independent variable is the one you are changing. The dependent variable is the one that you don't change.


For example, you are testing the growth of a plant based on the amount of water.





The dependent variable would be the growth (you're not physically changing it) and the amount of water would be the independent variable (you are going to put a different amount of water in each pot).





A way to remember it is: DRY MIX. (dependent, responding, y), (manipulative, independent, x)





The control is one that is neutral to ensure that there are no hidden variables.
ok, I know nothing about control but I do know about Independant and dependant variable.





Dependant Variable.


when two variables are dependant, it means that the change of one affects the other.


The variables affect each other. The variables are related to each other.


what happens to one variable depends on the other and vice versa





Independant variables.


variables are Not related to each other.


It doesn't matter what happens to one variable because it will not affect the other variable.
Independent is always on the X axis





Dependant is always on the Y axis





The dependent changes due to the independent, so when the independent is altered the dependant changes





Control is like if you have a graph that shows like you had 10 plants and each plant u gave a certain amount of water and you wrote down how much each grew, the control group would be the plant that didnt get any water.
independant variable- (normally x) does not depend on the other variable





dependant variable- (normally y) is the way it is b/c of the other variable





control- no idea

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