Re: Dumb but easy question, math related
To put it simple, a variable is something that you're trying to find or what is being tested. For example: 7X=56. X=8, you're trying to find X by testing numbers for the value of X until the equation is true. It would be false if you put the value of X at 7 or 9. In this case, you would be trying to find the number of white blood cells which as you said is the variable.
The definition does vary slightly from algebra and statistics in the fact that in algebra you're trying to find what the value for the variable is, where in statistics you're just simply looking for what is being tested.
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