Control group/ experimental & control variable of my experiment?

I'm doing my science project on batteries which is Energizer and Duracell, which battery would last longer in a flashlight. Can someone explain to me what a control group is, what an experimental variable is, and what a control variable is? Thanks for the help you guys :]Control group/ experimental %26amp; control variable of my experiment?
You are conducting a binary or discrete experiment.





The experimental variable is the time that the battery remains lit with a particular battery.





You can define the ';control group'; as either the value with Energizer or the value with Duracell or else the average value of Energizer and Duracell. If you do the latter, you need to make sure that you test an equal number of Energizer and Duracell batteries.





The control group is the base value and you are testing to see if the value for your experimental subject is the same or different from the base value to a degree of statistical significance.





The control variable is which battery type you are using.Control group/ experimental %26amp; control variable of my experiment?
That doesn't help at all

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