Collection and Presentation of Data

Data means quantitative information providing facts

Data means quantitative information providing facts in an aggregate manner. The singular of data is datum. A single fact is not data because data must

Primary data are data originally collected

Primary data are data originally collected for the first time for the purpose of a survey. They are collected directly by the investigator.

Secondary data are data already collected

Secondary data are data already collected by others and reused. The same data can be primary for the first collecting agency and secondary for all oth

The investigator is the person who

The investigator is the person who collects information personally. The respondent is the person who gives answers to the investigator.

A variable is data that can

A variable is data that can be classified in the magnitude of time or size. Examples include height, weight, length, and distance. A variable may be d