Sampling Flashcards
(12 cards)
What is a population?
- The whole set of items that are of interest.
What is a census?
A census observes or measures every member of a population.
What are sampling units?
Individual units of a population.
What is a sampling frame?
A list of sampling units.
What is a simple random sample?
Each sample has an equal chance of being selected.
What is systematic sampling?
Elements are chosen at regular intervals from an ordered list.
What is stratified sampling?
Population is divided into mutually exclusive strata and a random sample is taken from each.
What is quota sampling?
An interviewer selects a sample that reflects the characteristics of the whole population.
What is opportunity sampling?
Consists of taking the sample from people who are available at the time the study is carried out.
What is the difference between quantitative data and qualitative data?
Quantitative is numerical
Qualitative is non-numerical
What is the difference between a continuous and discrete variable?
- A continuous variable is a variable that can take any value in a given range.
- A discrete variable is a variable that can take only specific values in a given range.
What are classes in frequency tables?
Groups of data in a frequency table
