GF 5 Flashcards
the entire group of individuals who have the characteristics required by the researcher
Target population
the local population representative of the target population from which the researcher pulls his sample
Accessible population
how closely the sample mirrors the population
Representativeness
a sample that does not have the same characteristics as the population
Biased sample
when participants are selected in a way that creates a biased sample
Selection bias/Sampling bias
states that the larger the sample size, the more likely it is that values obtained from the sample represent the population
Law of large numbers
the process of selecting individuals for a study
Sampling
when an entire population is known and can be listed and sampling is a totally random process with each individual equally likely to be picked
Probability sampling
when the samples are taken based off accessibility; has a high potential for bias
Non probability sampling
selection of entire groups from pre-existing divisions, such as random sampling of whole classrooms in a school
Cluster sampling
equal random samples from each subgroup; each subgroup and sample is the same size
Simple Stratified Random Sampling (SSRS)
random samples from each subgroup; each subgroup is different sizes to reflect the composition of the population being sampled
Proportionate Stratified Random Sampling (PSRS)
an extra criteria added to convenience sampling that aids adequate representation of all subgroups
Quota Sampling
SRS that increases the probability of selection every time an individual is selected; no individual can be selected twice
Selection without replacement
SRS that maintains the same probability of being selected, but the same individual may be selected twice
Selection with replacement
