Term

Definition
collecting info and drawing inferences from a smaller pool 


Term

Definition
using subjects that are easily available 


Term
Purposive or Judgemental Sampling 

Definition
Sample based upon knowledge of population, its elements, purposes of the study 


Term

Definition
used when members of a population are difficult to locate 


Term

Definition
used to ensure generalizability when researcher has some knowledge of population and its characteristics 


Term

Definition
a sample that gives every member of the population a known (nonzero) chance of inclusion 


Term
Logic of Probability sampling 

Definition
1. Sample reflects population accurately because everyone has equal chance of inclusion, 2. Sample size increases, sample becomes more representative 


Term

Definition
having the same distribution of characteristics as its population 


Term

Definition
degree of error to be expected of a given sample design 


Term

Definition
unit, information is collected about the element and provides basis of analysis 


Term

Definition
largest group you can define, "theoretically specified aggregation of study elements" 


Term

Definition
list or uasi list of units composing a population from which sample is selected (i.e. class roster, prison list) 


Term

Definition
every person given equal chance of inclusion 


Term
Systematic Random smapling 

Definition
after first element has been selected, every nth member from a list 


Term
Stratified random sampling 

Definition
divide population into group, take random sample from each 


Term

Definition
Natural groups sampled, each group within population sampled, groups themselves treated as unit of analysis 

