Collecting Data Flashcards
What is Primary data?
-Original data collected first hand by fieldwork.
-Raw data that has not been manipulated
What are some example of Primary data?
-Counting and measuring
-asking questions
-sketching/photographs
What is secondary data?
Information from published sources which was collected/ manipulated by someone else
What are some examples of secondary data?
Textbooks and newspapers
Television reports
Maps
Planning documents
Websites
Processed census data
What are the 2 types of primary data?
Quantitive (numbers and counting) and qualitative (involve subjective judgements)
What are some different sampling methods?
-random
-systematic
-stratified
What is random sampling?
Samples are chosen at random so that every person in a questionnaire survey has an equal chance of being selected
What is systematic sampling?
Working to a system to collect data, for example, every 20 metres or paces along a road, or every 5th person.
What is stratified sampling?
Deliberately introducing a bias to ensure that the data reflects the diversity of a population i.e. asking the same proportion of people from the age group that lives in a city.