Terms : Hide Images
| 6543879893 | Test of Hypothesis | A decision procedure for evaluating the validity of a null hypothesis based on examining the value of a test statistic computed from a sample |  | 0 |
| 6543879894 | Null Hypothesis | The hypothesis of no difference, no change, and no association; usually written in the form Ho: parameter = hypothesized value. |  | 1 |
| 6543879895 | Alternate Hypothesis | The statement you will adopt in the situation in which the evidence (data) is so strong that you reject the null hypothesis. |  | 2 |
| 6543879896 | Type I Error | Rejecting a null hypothesis when it is in fact true; often results in a false positive |  | 3 |
| 6543879897 | Type II Error | Failing to reject a null hypothesis when it is in fact false; often results in a false negative |  | 4 |
| 6543879898 | Probability of a Type I Error | The level of significance (or the α-level); the acceptable α-level is set by the researcher based on the context of the problem |  | 5 |
| 6543879899 | Probability of a Type II Error | Increases when the variability of the sampling distribution increases; decreases as alpha increases or as the actual population parameter varies more substantially from the hypothesized value | | 6 |
| 6543879900 | Power | The probability of a hypothesis test correctly rejecting the null hypothesis; increases as alpha increases |  | 7 |
| 6543879901 | Level of Significance | The level at which the researcher believes that the study results most likely represent a non-chance event; also the probability of making a type I error. |  | 8 |
| 6543879902 | Test Statistic | A measure of how much the sample differs from the null hypothesis; for z and t, measured in the number of standard deviations (or standard errors) from the hypothesized mean |  | 9 |
| 6543879903 | Observed Significance Level | The probability, on the supposition that Ho is true, of obtaining a result at least as contrary to Ho as the result actually observed in the sample data; aka a p-value. |  | 10 |
| 6543879904 | Rejection Region | Identifies the unlikely values of the test statistic for which the null hypothesis will be rejected at the alpha level of significance |  | 11 |
| 6543879905 | p-value | The probability of observing a test statistic at least as extreme as the statistic obtained from a sample, given that the null hypothesis is true. |  | 12 |
| 6543879906 | statistical significance | A statistical statement of how likely it is that an obtained result occurred by chance |  | 13 |
| 6543879907 | Reject Ho | Hypothesis decision based on higher values for test statistic and lower p-values that yields statistically significant results |  | 14 |
| 6543879908 | Fail to Reject Ho | Hypothesis decision based on lower values for the test statistic and higher p-values that indicates a lack of statistically significant results |  | 15 |
