Download presentation

Presentation is loading. Please wait.

Published byAlejandro Hellyer Modified over 4 years ago

1
Types of Variables AP Statistics 06-07 Dobson

2
Review of Terms Individual: The objects described by a set of data, individuals may be people, animals or things Ex: Students in an AP Statistics class Variable: any characteristic of an individual. A variable can take on different values for different individuals Ex: Heights of individuals: Student #1: 5’ 5” Student #2: 5’ 7” Student #3: 5’ 2”

3
**Two Types of Variables Quantitative:**

Numeric value that it makes sense to do arithmetic operations (+, -, x, /) Finding an arithmetic “average” makes sense EX: Height Weight Age Income Test Scores

4
**Types of Variables Categorical**

Records which of several groups or categories to which an individual belongs If there are only 2 possible categories, the variable is called binary Ex: Gender Race SES (socio-economic status) Marital status

5
Caution!!! Most quantitative variables can be asked in such a way as to make them a categorical variable. Ex: Age: Please choose the category that describes how old you are OVER 80

6
**Determine if the variable is Quantitative or Categorical**

Height Armspan Whether or not the individual went to sleep before 12:00am Month of birth Distance from home Whether the individual has a cell phone How many messages a person has sent in the last 24 hours The age of a bride on her wedding day Whether the bride is older, younger, or the same age as the groom in a wedding couple The number of letters in a person’s last name Check your answers on the next slide

7
**Quantitative Variables**

Height Armspan Distance from home How many messages a person has sent in the last 24 hours The age of a bride on her wedding day The number of letters in a person’s last name Categorical Whether or not the individual went to sleep before 12:00am Month of birth Whether the individual has a cell phone Whether the bride is older, younger, or the same age as the groom in a wedding couple

8
**Further Resources Practice of Statistics: pg 4-7 Homework Assignment:**

1-1: Problem #1a-p :

Similar presentations

OK

Chapter 2 Data. Learning Objectives 1.Define Data. 2.Identify populations and samples. 3.Identify the cases and variables in any data set. 4.Know the.

Chapter 2 Data. Learning Objectives 1.Define Data. 2.Identify populations and samples. 3.Identify the cases and variables in any data set. 4.Know the.

© 2018 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google