experiments are carried out to test a hypothesis by changing

experiments are carried out to test a hypothesis by changing one variable at a time and including an unchanged bariable termed a
1) experimental variable
2)altered variable
3)control
4) stable variable

Solution

Answer : 3 Control

Experimental Variable : a variable whose values are independent of changes in the values of other variable

Altered Variable : It is also known as dependent variable. Measure of dependent variable will changes as the independent variable is altered.

Stable Variable : It is a stability of random variable is that a linear combination of two independent variables has the same distribution