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A variable , usually notated by capital letters such as X and Y , is a characteristic or measurement that can be determined for each member of a population . Variables may be numerical or categorical . Numerical variables take on values with equal units such as weight in pounds and time in hours . Categorical variables place the person or thing into a category . If we let X equal the number of points earned by one math student at the end of a term , then X is a numerical variable .
Please check all the words that can be used instead of the target word in the same context. Note that the morphology of the target (third person singular, past tense etc.) is considered to be applied to the candidate automatically in the process of paraphrasing.