Chapter 5 Flashcards
sampling error
sample does not equal population
goal of sample
should permit accurate generalization of findings from the sample to the population
representative sample
displays varaitions in its members similar to those existing in the population of interest
the error of estimation
a number that expresses the degree to which the data obtained from the sample are expected to deviate from the population
probability samples
allow us to meaningfully estimate the error in our sample
sampling error
the extent to which characteristics of individuals selected for the sample differ from those of the population
error of estimation is derivied from
population size, sample size, varaince of the data
a sample will be more similar to population when
the population size is smaller, the sample is larger, the varaince in the data is smaller
simple random sampling
every possible sample of the desired size of the same chance of being selected from the population
sampling frame
a list of the population from which the sample is to be drawn
misgeneralization
generalizing the findings of a study to a population that differs fromt he population from which the sample was drawn
problem of nonresponse
failure to obtain responses from individuals whom the researcher has selected for a sample
power
the ability of a research design to detect any effects of the variable being studied that exist in the data
convenience sample
use whatever participants are readily available
