Question

Which experimental design decision would most likely produce invalid and unreliable results?

having more than one controlled variable
having only one control group
having more than one independent variable
having only one experimental group

Answer 1

its c. having more than one independent variable

Step-by-step explanation:

Answer 2

Step-by-step explanation:

The independent variable determines the value that needs to be calculated or the decision that needs to be made from the observations of the experiment. Hence, experimental design decision would most likely produce invalid and unreliable results when having more than one independent variable.