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Statistics - Exam 4
| Question | Answer |
|---|---|
| Probability of rejecting the null hypothesis when in fact the null hypothesis is true | level of significance |
| Denoted by a (alpha) | level of significance |
| If a (alpha) is not given use: | .05 |
| _______ is a test or statement about a population parameter such as mean, and it must contain the condition of equality. | null hypothesis |
| ______ is denoted by H0 | null hypothesis |
| _______ is a test or statement about a population parameter and tests for a significant change | alternative hypothesis |
| _______ is denoted by H1 | alternative hypothesis |
| Psychology, education, sociology and athletics are more likely to use a _______ alpha | larger |
| Medical professions and engineering are more likely to use a _______ alpha | smaller |
| Set of values of the test statistic that leads to the rejection of the null hypothesis | critical region |
| Value that separates the critical region from the non-critical region | critical value |
| Value computed from the sample data ; used to determine whether to reject the null hypothesis or not | test statistic |
| Probability of getting a sample statistic (such as the mean) or more extreme value in the direction of the alternative hypothesis when the null hypothesis is true | p-value |
| if p-value is less than or equal to alpha then ________ | reject the null hypothesis |
| if p-value is greater than alpha then ________ | do not reject the null hypothesis |
| A very small p-value indicates a ________ of the null hypothesis | strong rejection |
| complete collection of people, objects, scores, etc. to studied | population |
| any sub collection of data drawn from a population | sample |
| value measuring some characteristic of a population | parameter |
| value measuring some characteristic of a sample | statistic |
| proportion of a population symbol | p |
| mean of a population symbol | µ (mu) |
| variance of a population symbol | σ² |
| standard deviation of a population symbol | σ |
| variance of a sample symbol | s² |
| standard deviation of a sample symbol | s |
| mean of a sample symbol | x bar |
| proportion of a sample symbol | p hat |
| What tells the researcher how confident he or she is with the final conclusion? | p-value |
Created by:
K1N1V
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