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Which of the following CORRECTLY defines vocabulary we use to describe tidy data? ( There may be more than one correct answer. ) A variable

Which of the following CORRECTLY defines vocabulary we use to describe tidy data? (There may be more than one correct answer.)
A variable is a quantity, quality, or property that you can measure.
A variable is a column of values in a data frame.
A row of data is a set of measurements under the same conditions for a single entity.
A value is the state of a variable when it was measured.

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