Chapter One/Two Flashcards
(12 cards)
What are individuals?
Objects described by a set of data
What are variables?
Characteristics of individuals
What are categorical variables?
places individuals into one of several categories
What are numerical variables?
Numerical values for which adding and averaging makes sense
What is a population?
The entire group we want to learn about
What is a sample?
People used to test/draw conclusions
What is a census?
When you can survey an entire population
What is a convenience sample?
The easiest way to reach individuals, it is quick but not representative of the population
What is a voluntary response sample?
People that choose to be apart of the sample
What is a simple random sample?
everyone has equal chance of being chosen, difficult to do but it is ideal
What is a stratified random sample?
When you divide the population into groups and then take a sample from each group and combine
What is a Systematic sample?
When you order the population and select every “nth” person
