| A | B |
|---|
| nominal | data can only be named |
| ordinal | data can be orderd, any mathematical computation is meaningless |
| interval | temperature scale, time line |
| ratio | money, age, length |
| qualitative | an atributte, a numerical one-to-one relationship |
| quantitative | same number can belong to more than one data |
| population | the entire data set |
| sample | part of a data set |
| statistic | the numerical descriptor of a sample |
| parameter | the numerical descriptor of a population |
| census | all the data is considered |
| sampling | a technique when you are considering only some data |
| experiment | studying the effect of a treatement |
| simulation | use when an experiment could turn dangerous |
| random | the most common sampling technique |
| stratified | layered sampling |
| cluster | sampling using geographical areas |
| systematic | every "n"th |
| convenience | gives most biased results |
