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psych stats final
| Question | Answer |
|---|---|
| inferential statistics | Statistical tests that allow us to make generalizations about a population based on a sample |
| t test | An inferential statistical test that compares one dependent (outcome variable) between two groups |
| t curve | The modified normal curve, created by william gosset and used to determine statistical significance when performing a t test |
| degrees of freedom (df) | How much freedom statisticians have to vary the numbers in their data set and still get the same parameter |
| parameter | a value usually numerical, that describes a population, such as mean or standard deviation |
| t statistic | the t value calculated by a t test |
| Cohen's d | The effect size measure used when conducting a t test |
| one-sample t test | a t test that compares one sample of data with a test value (that is, the value believed to be true if the null hypothesis is supported) |
| test value | the value believed to be true if the null hypothesis is supported. This is often, but not always, a mean value |
| test statistic | A number that is dervived via a formula for different statistical tests and used to derive a p value. The p value is then used to determine statistical significance. |
| data scraping | a catch-all term for a number of different techniques that allow people to "scrape" existing publicly available data from another source, such as a website filled with public dating profiles. |
| zombie data | Point data values that are often repeated but wrong |
| between-subject research design | A research design that studies the differences between two different groups of participants, with each group making up one condition of the independent (outcome) variable |
| independent t test | A t test that measures whether two populations (represented by independently selected groups) differ from each other on a quantitative outcome variable |
| paired-sample t test or dependent t test | a t test used when the participants are not selected at random. Instead, the participants are paired based on similarities, or the same research participants are studied at two points in time |
| within-subject research design | A research design that evaluates how one person or thing behaves before and after experimental manipulation |
| Repeated measures research design | a type of within-group research design in which participants serve as both the control group and the experimental group |
Created by:
skyfalls
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