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Why can you not draw a conclusion about the effect of one variable - in an investigation when the other key variables are not controlled?
Wiki User
∙ 13y ago
Because there is no way to know what effects the other key variables are having on outcome. So, there is no way to evaluate any one variable, or its effects on outcome.
Wiki User
∙ 13y ago
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Why cant you draw a conclusion about the effect of one variable in an investigation when the other key variables are not controlled?
If none of the variables are constant (or controls) you have no idea which variable or combination of variables caused the effect.
What variable depends on the controlled variables?
The dependent variable does.
Why is it important to have a constant in an experiment?
In order for the results to be valid, the dependent variable can only be affected by the independent variable, so somethings need to be kept CONSTANT. The things that need to be kept constant are called CONTROLLED VARIABLES. Even if controlled variables are affecting the dependent variable(s), which they usually do, keeping them constant will ensure that all trials of an investigation were equally impacted by the controlled variables, therefore allowing one to see the impact of an independent variable on the dependent variable. All in all, a 'constant' in a science experiment should actually be called a 'controlled variable' and the description of such a variable is described in the third point. Hope this clarifies.
What is the difference between dependent and controlled variables?
The controlled variable is the one that you chose to change while the dependant is the variable that changes because it is effected by the controlled variable
What is a variable in relation to an investigation?
time or length could be two different variables depending in what the investigation was based on
Why cant you draw a conclusion about the effect of one variable in an investigation when the other key variables are not controlled?
If none of the variables are constant (or controls) you have no idea which variable or combination of variables caused the effect.
What is the function of a control in a scientific investigation?
You establish a controlled variable from which you can compare your results from your experimental variables.
What are three variables in a controlled experiment?
Manipulated Variable, Responding Variable, And Controlled Variable.
What variable depends on the controlled variables?
The dependent variable does.
What are the manipulated and responding variables in this investigation?
dependent variable
What are variables and uncontrolled variables?
A Controlled Variable is a variable that will stay the same. An Uncontrolled Variable is a variable that stays at random during testing.
What are the 3 variables in a science fair project and what do they mean?
The three variables of a science project are: 1. Controlled variable: A controlled variable means the part of the experiment that stays the same. This is also called the dependent variable. 2. Manipulated variable: A manipulated variable is something that can be changed by the experimenter. Also known as the independent variable. 3. Responding variable: A responding variable is the variable which you have to measure to get your results. So, you do not know the values of this variable until you measure it.
What is the controlled variables in an experiment?
Dependent Variable
What are the controlled variables and changed variables when soybeans absorb water?
The controlled variable is the type of soybean, and the changed variable is the type of water that the soybean is absorbing.
In an experiment what are the controlled variables?
The variable YOU change which will in turn effect another variable (the dependent variable). The controlled variable is plotted on the x - axis of a graph.
Why it is important to have constants in an experiment?
In order for the results to be valid, the dependent variable can only be affected by the independent variable, so somethings need to be kept CONSTANT. The things that need to be kept constant are called CONTROLLED VARIABLES. Even if controlled variables are affecting the dependent variable(s), which they usually do, keeping them constant will ensure that all trials of an investigation were equally impacted by the controlled variables, therefore allowing one to see the impact of an independent variable on the dependent variable. All in all, a 'constant' in a science experiment should actually be called a 'controlled variable' and the description of such a variable is described in the third point. Hope this clarifies.
Why is it important to have a constant in an experiment?
In order for the results to be valid, the dependent variable can only be affected by the independent variable, so somethings need to be kept CONSTANT. The things that need to be kept constant are called CONTROLLED VARIABLES. Even if controlled variables are affecting the dependent variable(s), which they usually do, keeping them constant will ensure that all trials of an investigation were equally impacted by the controlled variables, therefore allowing one to see the impact of an independent variable on the dependent variable. All in all, a 'constant' in a science experiment should actually be called a 'controlled variable' and the description of such a variable is described in the third point. Hope this clarifies.
