(A) Flowchart variables

(B) Discrete variables

(C) Continuous variables

(D) Measuring variables

(A) Primary data sources

(B) Secondary data sources

(C) Itemised data sources

(D) Pointed data sources

(A) Lowercase Greek letters

(B) Roman letters

(C) Associated Roman alphabets

(D) Uppercase Greek letters

(A) Behavioural tools

(B) Serial tools

(C) Industry statistics

(D) Statistical tools

(A) Descriptive statistics

(B) Inferential statistics

(C) Industry statistics

(D) Both A and B

(A) Population parameter

(B) Sample parameter

(C) Sample statistic

(D) Population mean