Chapter 1.2（课件）- 《统计学基础（英文）》同步教学（人民大学·第7版）

Elementary Statistics Seventh Edition Chapter 1 Introduction to Statistics Copyright 2019, 2015, 2012, Pearson Education, Inc. Slide 1 Slide ‹#› If this PowerPoint presentation contains mathematical equations, you may need to check that your computer has the following installed: 1) MathType Plugin 2) Math Player (free versions available) 3) NVDA Reader (free versions available) 1 Chapter Outline 1.1 An Overview of Statistics 1.2 Data Classification 1.3 Data Collection and Experimental Design Copyright 2019, 2015, 2012, Pearson Education, Inc. Slide ‹#› 2 Section 1.2 Data Classification Copyright 2019, 2015, 2012, Pearson Education, Inc. Slide ‹#› Slide ‹#› Section 1.2 Objectives How to distinguish between qualitative data and quantitative data How to classify data with respect to the four levels of measurement: nominal, ordinal, interval, and ratio Copyright 2019, 2015, 2012, Pearson Education, Inc. Slide ‹#› 4 Types of Data (1 of 2) Qualitative Data Consists of attributes, labels, or nonnumerical entries. Major Place of birth Eye color Copyright 2019, 2015, 2012, Pearson Education, Inc. Slide ‹#› 5 Types of Data (2 of 2) Quantitative data Numerical measurements or counts. Age Weight of a letter Temperature Copyright 2019, 2015, 2012, Pearson Education, Inc. Slide ‹#› 6 Example: Classifying Data by Type The table shows sports-related head injuries treated in U.S. emergency rooms during a recent five-year span for several sports. Which data are qualitative data and which are quantitative data? (Source: BMC Emergency Medicine) Sports-Related Head Injuries Treated in U.S. Emergency Rooms Sport Head injuries treated Basketball 131,930 Baseball 83,522 Football 220,258 Gymnastics 33,265 Hockey 41,450 Soccer 98,710 Softball 41,216 Swimming 44,815 Volleyball 13,848 Copyright 2019, 2015, 2012, Pearson Education, Inc. Slide ‹#› 7 Solution: Classifying Data by Type Sports-Related Head Injuries Treated in U.S. Emergency Rooms Sport Head injuries treated