Term
|
Definition
| When the design of a survey systematically favors certain outcomes |
|
|
Term
|
Definition
| Consists of a margin of error(MOE) and a level of confidence(LOC). The MOE tells how close the sample statistic lies to the population parameter. The LOC tells what percent of all possible samples satisfy the MOE. |
|
|
Term
|
Definition
| Sample comprised of whichever individuals are easiest to reach. Example: surveying just your classmates |
|
|
Term
| Formula for calculating the margin of error |
|
Definition
|
|
Term
|
Definition
| translates sampling variability into a statement of how much confidence we can have in the results of a survey. |
|
|
Term
|
Definition
| the failure to obtain data from an individual selected for a sample. People can refuse to participate or are unable to be contacted. |
|
|
Term
|
Definition
| errors not related to the act of selecting a sample from the population. |
|
|
Term
|
Definition
| A number that describes the population. |
|
|
Term
|
Definition
| a sample chosen by chance. You must know which samples are possible and the probability each possible sample has. The probabilities do not have to be equal. |
|
|
Term
|
Definition
| Errors in mechanical tasks, like calculation errors or data entry errors. |
|
|
Term
|
Definition
| the deviation between the sample statistic and the population parameter caused by chance in selecting a random sample. A type of sampling error. |
|
|
Term
|
Definition
|
|
Term
|
Definition
| occurs when someone gives an incorrect response, whether intentional or unintentional. |
|
|
Term
|
Definition
| errors caused by the act of taking a sample. |
|
|
Term
|
Definition
| the list of individuals from which a sample is chosen |
|
|
Term
| Simple Random Sample (SRS) |
|
Definition
| A sample chosen from the population in such a way that every individual has an equal chance of being chosen. |
|
|
Term
|
Definition
| A number that describes a sample. |
|
|
Term
|
Definition
| The sampling frame is divided into groups (called strata) by a common characteristic (ie, gender, zip code, level of education). Take a separate SRS from each stratum and combine these to make the complete sample. |
|
|
Term
|
Definition
a long string of the digits 0 through 9 inclusive with two properties:
**Each entry in the table is equally likely to be any of the 10 digits 0 to 9
**The entries are independent of each other. In other words, knowledge of one part of the table gives no information about any other part of the table. |
|
|
Term
|
Definition
| any specific experimental condition applied to the subjects of an experiment. |
|
|
Term
|
Definition
| a sampling error that occurs when some groups in the population are left out of the process of choosing the sample. |
|
|
Term
| Voluntary Response Sample |
|
Definition
| The sample chooses itself by responding to a general appeal. Examples are write-in or call-in opinion polls and online polls |
|
|
