Research Methods Flashcards
What is data collection interested in?
The population
What are the two types of sampling methods?
Probability sampling and non-probability sampling
What is the difference between probability sampling and non-probability sampling?
Probability sampling is based on a random process and non-probability sampling method that is not based on a random process
What is the difference between simple random sampling and stratified sampling?
Simple random sampling is where every member of the population has the same chance of being selected into the sample. Whereas stratified sampling is when you divide the population into strata and then draw a random sample from each strata.
What is the difference between cluster sampling and systematic sampling?
Cluster sampling is when you divide the population into strata and draw random samples from randomly chose strata. Systematic sampling is a sample is made up of every nth person or object.
What is the difference between convenience sampling and snowball sampling?
Convenience sampling is a sampling method based on proximity not representativeness. Whereas, snowball sampling is chosen on the basis of being referred by other members of the sample.
What is quota sampling?
Quota sampling is the sample that is made up of a certain number of people who match a set of pre-determined characteristics.
Why is non-probability sampling biased?
Because not every member of the population has an equal chance of selection.
What is data management?
A critical administrative process
What do you need to ensure with data checking?
Quality control
What does quality control do?
Quality control checks the data meets the assumptions of analytic methods
Why are statistics important?
Because statistics are a tool to help you learn about data
What are descriptive statistics?
Descriptive statistics are numerical summaries of the sample of scores for individual variables
What is the difference between central tendency and variability?
Central tendency is the average (where the center of the set of scores is located). Whereas, the variability is how spread out the scores are.
What is the difference between the standard deviation and the normal distribution (bell curve)?
The standard deviation is the average deviation from the center of the set of scores. Whereas, the normal distribution (bell curve) is the symmetric distribution defined by the mean and the standard deviation.
