Sampling Flashcards
Population
Entire group of individuals we want information about
Census
Collects data from every individual in the population
Sample
Subset of individuals in the population from which we actually collect data
Simple Random Sample
Every set of individuals has an equal chance to be in the sample actually selected
SRS includes
1) # of start to finish
2) _ digit # =
3) start at line
4) left to right
5) skip
6) stop after
Experiment
Applies a treatment to one part of The experimental group and no treatment in the other part of the group
Stimulation
Mathematical or physical model to reproduce the conditions of a situation of process
Survey
Used to take a census or sample investigate certain characteristics of a population
Observational studies
Attempt to understand cause and effect
Stratified sampling
Subdivide the entire population at least two different subpopulations and then use some method to draw a sample from each sub population
Cluster sample
Classified population into groups of individuals that are located near each other
Systematic
Interval
Bias
Systematic favoring of outcomes
Under or over representation of certain groups
Selection bias
Bias that occurs because of how we select our sample
Undercoverage bias
Certain groups of people are left out of a sample
