The Basic Practice of Statistics 7th Edition

Published by W. H. Freeman
ISBN 10: 1-46414-253-X
ISBN 13: 978-1-46414-253-6

Chapter 1 - Picturing Distributions with Graphs - Chapter 1 Exercises - Page 38: 1.23b


There are five variables in the set. Categorical variables: Medical School, Sex, Specialty Sought Quantitative variables: Age, USMLE Age is measured in years. USMLE is measured in points.

Work Step by Step

A categorical variable places the individuals of a dataset into one of several groups or categories. In this dataset, for example, the Medical School states what school the student attended. A quantitative variable takes numerical values that we can use to perform arithmetic operations such as addition or finding an average. In this data set, we can find the average USMLE score or the average age of the students.
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