Chapter 1 - Describing Graphs with Data Flashcards
a characteristic that changes or varies over time and/or for different individuals or objects under consideration
Variable
Hair color, white blood cell count, time to failure of a computer component, Apple stock price (over time) These are examples of?
Variables
the individual or object on which a variable is measured
Experimental Unit
results when a variable is actually measured on an experimental unit
a Measurement
A set of measurements called __, can be either a __ or a ___
data sample population
Each of these are an example of:
1) Hair color
2) Person
3) Brown, black, blonde, etc.
1) Variable 2) Experimental unit 3) Typical Measurements
Each of these are an example of: 1) Time until a light bulb burns out 2) light bulb 3) 1500 hours, 1535.5 hours, etc.
1) Variable 2) Experimental unit 3) Typical Measurements
One variable is measured on a single experimental unit
Univariate Data
Two variables are measured on a single experimental unit
Bivariate Data
More than two variables are measured on a single experimental unit
Multivariate Data
Types of Variables
1) Qualitative 2) Quantitative
Types of Quantitative Variables
a) discrete b) continuous
measure a quality or characteristic on each experimental unit.
Qualitative (categorical) Variables
measure a numerical quantity on each experimental unit
Quantitative Variables
if it can assume only a finite or countable number of values
Discrete Quantitative Variable