| A | B |
|---|
| population | entire group of individual of whom you want information about ( parameter) |
| Sample | a sub-set of the population - statistics |
| SRS- Simple Random Sample | Each subset of a population has an equal chance of being chosen |
| Stratified | Divide population into several sub- populations, then choose a few individuals frome ach sub- population |
| Cluster | When entire sub- populations/ groups are chosen at random Example: Randomly select entire homerooms |
| Systematic | choose individuals systematically from a sampling frame Example: have a numbered list of al WA students and then choose every nth student |
| Multistage | Combines 2 or more sampling methods |
| convience | LAZY |
| response bias | Anything in a survey’s design (wording. Phrasing) that could influence a response |
| Non- Response Bias | When a large portion of the sample fail to respond |
| Voluntary Response | When a participant chooses whether or not to be a party of a survey |
| Under coverage | When part of our population of interest is under represented in our survey |
