| A | B |
|---|
| Hypothesis | An if-then statement of conjecture that relates variables to one another. |
| Population | All the possible subjects or cases of interest. |
| Sample | A subset of a population. |
| Sampling error | The difference between sample and population values. |
| Null hypothesis | A statement of equality between sets of variables. |
| Research hypothesis | A statement of inequality between two variables. |
| One-tailed test | A directional test. |
| Two-tailed test | A test of a nondirectional hypothesis where the direction of the difference is of little importance. |
| Normal curve [bell-shaped curve] | A distribution of scores that is symmetrical about the mean |
| Asymptotic | The quality of the normal curve such that the tails never touch the horizontal axis. |
| z score [Standard scores] | A raw score that is adjusted for the mean and standard deviation of the distribution from which the raw score comes. |
| Significance level | The risk set by the researcher for rejecting a null hypothesis when it is true. |
| Statistical significance | The risk set by the researcher for rejecting a null hypothesis when it is true. |
| Type 1 error | The probability of rejecting a null hypothesis when it is true. |
| Test static value[Obtained value] | The value that results from the application of a statistical test. |
