key background knowledge

Question 1

categorical variables

Answer 1

1. nominal - order of categories has no relevance
2. ordinal - order of categories is meaningful

Question 2

continuous variables

Answer 2

1. interval - measurement with equal intervals between values
2. ratio - same as interval but has a true zero meaning

Question 3

variable

Answer 3

topic or question

Question 4

observation

Answer 4

answer of each question

Question 5

case

Answer 5

unit of observation

Question 6

data

Answer 6

collection of observations