When referring to statistics, variable means that numbers change and can go up and down. If something is constant, numbers remain unchanged.
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What is the difference between statistics and parameter
A nominal variable is a variable measured in current dollars (the value of the dollar for the specific period discussed), and a real variable is a variable measured in constant dollars (the value of the dollar for the base period). That is, a real variable adjusts for the effects of inflation.
The difference between these both is that the control is what stays the same in an experiment and the variable is what changes.
a control is a object that cant be changed in an experiment and a variable is a object that can be changed in a expirament
All i know it is about science. If anybody knows please reply :}