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geography samples - Coggle Diagram
geography samples
unbiased sample
simple random sampling (SRS)
randomly selecting people for the test
multistage sampling
a combination of 2 or more SRS's
stratified random sampling
taking a population and grouping them into groups known as strata
samples
they are part of the population that we take out to examine and draw conclusions from
a good sample is
represents the population as a whole
and gives each "thing" an equal chance to be a representative or being chosen
biased samples
occurs when one or more parts of the population are favoured over others
convenience sample
only includes people who are easy to reach
voluntary response sample
only includes people who voluntary want to take part in the sampling
sampling "devices"
random digits table