Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Stats Vocab
PSY 2073
| Term | Definition |
|---|---|
| Population | Complete collection of all units or elements |
| Sample | Portion of the population selected to represent the whole population |
| Parameter | Numerical quantity, such as an average, that summarizes some characteristic of the population. Population parameters are symbolized by letters from the Greek alphabet |
| Statistic | Numerical quantity, such as an average, that summarizes some characteristic of the sample. Sample statistics are symbolized by letters from the Roman alphabet. |
| Sampling error | Discrepancy, or amount of error, that exists between a sample statistic and the corresponding population parameter |
| Descriptive statistics | Methods for describing or summarizing the characteristics of a set of numbers |
| Inferential statistics | Methods for making valid statements (inferences) about an entire population based on results obtained in a sample |
| Random sampling | Every person in the population has an equal chance of being selected into the sample |
| Representative sampling | Use a decision rule to get an unbiased sample |
| Cluster sampling | Randomly pick locations to study, and then sample intensively in that location |
| Stratified random sampling | Randomly selecting people within "strata" or groups |
| Convenience sampling | A readily available sample of people |
| Variable | Characteristic or condition that changes or has different values for different individuals |
| Constant | Characteristic or condition that does not vary but is the same for every individual |
| Random assignment | Each person in the study has an equal chance of being assigned to each group or condition of the study |
| What can impact external validity of a study? | Random sampling |
| What can impact internal validity of a study? | Random assignment |
| Nominal measurement | Observations are labeled and categorized, not numeric |
| Ordinal measurement | Consists of ranking observations in terms of size or magnitude |
| Interval measurement | Equal intervals between numbers reflect equal differences in magnitude, but there is no absolute zero point |
| Ratio measurement | Equal intervals plus an absolute zero point |
| Dichotomous variable | Variable described and assessed with respect to 2 categories |
| Categorical variables | Variable described and assessed with respect to 3-10 categories |
| Continuous variable | Variable described and assessed with respect to 10 or more categories |
Created by:
juangon
Popular Math sets