Statistics: Informed Decisions Using Data (4th Edition)

Published by Pearson
ISBN 10: 0321757270
ISBN 13: 978-0-32175-727-2

Chapter 1 - Section 1.1 - Assess Your Understanding - Explaining the Concepts - Page 14: 56


Quantitative variable: a number must be used to measure a quantitative variable. Also, addittion and subtraction between two different measures has meaning. Qualitative variable: it is an attribute or characteristic of an individual. Sometimes a number is used as a qualitative variable, but, in this case, addittion and subtraction between two numbers has no meaning.

Work Step by Step

Examples: - quantitative variable: the height of individuals, the mass of a banana, the volume of water in a cup, etc. - qualitative variables: hair color, nationality, ID number, etc. Note that the ID number is a number, but we do not add or subtract two different ID number because it has no meaning.
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