skilet said:I am doing a Lab report on "Using Properties To Identify Pure Substances"
I want to know what does the Experimental design mean. Can anyone tell
me what it means?
Thanks,
skilet said:you mean like I have to draw a diagram and explain how the experiment was done?
thanks
Experimental design is a research method used to determine the cause and effect relationship between variables. It involves systematically manipulating independent variables and measuring their effects on dependent variables to draw conclusions about the relationship between the two.
Experimental design is important because it allows scientists to control and manipulate variables in a systematic way, ensuring that any observed effects are due to the independent variable and not other factors. This helps to ensure the validity and reliability of the results.
The components of experimental design include: a clear research question or hypothesis, identification of independent and dependent variables, selection of a sample or population, random assignment of participants to groups, control of extraneous variables, and a control group for comparison.
The main difference between experimental and non-experimental design is the level of control over variables. Experimental design involves manipulating and controlling variables, while non-experimental design simply observes and measures variables without manipulation. Experimental design is considered more rigorous and allows for stronger conclusions to be drawn.
Some common types of experimental design include: pre-experimental design (with no control group), true experimental design (with a control group and random assignment), quasi-experimental design (with a control group but no random assignment), and factorial design (with multiple independent variables). Within these categories, there are also various specific designs such as between-subjects, within-subjects, and mixed designs.