Relations in categorical data

Question 1

types of categorical data

Answer 1

two categories: male/female
more than two unordered categories: blood group, cause of death, cancer type
categorical with ordered categories: severity of symptoms
discrete count: number of children

Question 2

relations in categorical data

Answer 2

a table might present age group and education together

• marginal distribution: distributions that appear in the margins like totals at the bottoms and sides
• segmented bar charts are a good way to represent this

Question 3

conditional distributions

Answer 3

eg. conditional on a person being female, cuts down the table

Question 4

joint relative frequency

Answer 4

aka joint distribution eg. proportion of total that are female and neoplasm deaths