Section 1.2 Data Classifications Copyright © 2008 by Hawkes Learning Systems/Quant Systems, Inc. All rights reserved. HAWKES LEARNING SYSTEMS math courseware specialists Section 1.2 Data Classifications

Descriptions and labels Counts and measurements HAWKES LEARNING SYSTEMS math courseware specialists Introduction to Statistics 1.2 Data Classifications Qualitative vs. Quantitative: Qualitative Quantitative Descriptions and labels Counts and measurements

The weights of members of the football team. Quantitative HAWKES LEARNING SYSTEMS math courseware specialists Introduction to Statistics 1.2 Data Classifications Classify as Qualitative or Quantitative: The weights of members of the football team. Quantitative The flavors of Ben and Jerry’s Ice Cream. Qualitative The jersey numbers of a women’s basketball team. Student ID numbers

Usually counts of things HAWKES LEARNING SYSTEMS math courseware specialists Introduction to Statistics 1.2 Data Classifications Continuous vs. Discrete: Qualitative Quantitative DISCRETE Continuous Usually counts of things Usually measurements

The temperature in Fahrenheit of cities in North Mississippi. HAWKES LEARNING SYSTEMS math courseware specialists Introduction to Statistics 1.2 Data Classifications Classify as discrete or continuous: The temperature in Fahrenheit of cities in North Mississippi. Continuous The number of rooms in a house. Discrete The number of peanuts in a jar. The height of a door in inches.

0 means the absence of something HAWKES LEARNING SYSTEMS math courseware specialists Introduction to Statistics 1.2 Data Classifications Levels of Measurement Ratio 0 means the absence of something Interval 0 is a placeholder Ordinal Order Nominal Names

Quantitative – Interval The colors contained in a box of crayons. HAWKES LEARNING SYSTEMS math courseware specialists Introduction to Statistics 1.2 Data Classifications Determine the level of measurement: Today’s high temperature (in Fahrenheit) for varying cities across the U.S. Quantitative – Interval The colors contained in a box of crayons. Qualitative – Nominal The boiling point (in Kelvin’s) for varying chemical compounds. Quantitative – Ratio The individual page numbers at the bottom of each page in the statistics book. Quantitative – Ordinal