Variables and Data What is a variable A

Variables and Data

What is a variable? A variable is a characteristic that changes or varies: 2

What is a variable? A variable is a characteristic that changes or varies: ü Over time 3

What is a variable? A variable is a characteristic that changes or varies: ü Over time, and/or ü For individuals or objects 4

What is a variable? A variable is a characteristic that changes or varies: ü Over time, and/or ü For individuals or objects Microsoft Clipart 5

What is an experimental unit? An experimental unit is: • The individual or object on which a variable is measured. 6

What is an experimental unit? An experimental unit is: • The individual or object on which a variable is measured. Microsoft Clipart 7

What is data? Data is: • Individual pieces of information 8

What is data? Data is: • Individual pieces of information. • A set of values of qualitative or quantitative variables. 9

Types of Data • Univariate data 10

Types of Data • Univariate data • Bivariate data 11

Types of Data • Univariate data • Bivariate data • Multivariate data 12

Types of Data 13

Types of Data Qualitative 14

Types of Data Qualitative Quantitative 15

Types of Data Qualitative Quantitative Discrete 16

Types of Data Qualitative Quantitative Discrete Microsoft Clipart 17

Types of Data Qualitative Quantitative Discrete Continuous 18

Types of Data Qualitative Quantitative Discrete Continuous Microsoft Clipart 19