Question

Which of the following statements is true about control variables?

In natural experiments, they can't always be controlled.

They can't be measured.

They are the variables that are being tested.

They are controlled in order to carry out a fair test.

Answer 1

@563blackghost

Answer 2

Im not to sure about this one it can be A or D....

`A variable that is held constant in order to assess or clarify the relationship between two other variables. `

Answer 3

Ooops forgot to cite my source....

http://www.businessdictionary.com/definition/control-variable.html

Answer 4

I think D too. x)

Answer 5

Thanks :)

Answer 6

Np. ツ