transformations
Goes up and down
K
each individual in the population has the equal chance of being selected
simple random sample
a symmetrical three-dimensional shape, either solid or hollow, contained by six equal squares.
cube
Goes left and right
H
individuals volunteer to be part of the sample
self selected sample
sphere
Horizontal Reflection
B
individuals are selected based on how accessible they are
convenience sample
a solid or hollow object which tapers from a circular or roughly circular base to a point.
cone
Vertical Stretch/Compress
A
members of the sample are chosen according to rule, such as every xth individual in the population
systematic sample
a solid geometric figure whose two end faces are similar, equal, and parallel rectilinear figures, and whose sides are parallelograms.
prism
the population is divided into groups and individuals from each group are chosen
stratified sample
a solid geometric figure with straight parallel sides and a circular or oval cross section
cylinder