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Research 1
Statistics Review
| Question | Answer |
|---|---|
| Descriptive statistics that represent averages or scores that are representative of a distribution; includes mean, median, mode | Central Tendency |
| A nonparametric test applied to nominal data, comparing observed frequencies within categories to frequencies by chance is? | Chi Square Test |
| Measure of central tendency that is the "average" | Mean |
| Measure of central tendency that is the "middle" score | Median |
| Measure of central tendency that is the most common. | Mode |
| The variation from the central tendency is know as the? | Variance |
| A descriptive statistic reflecting the variability or dispersion of scores around the mean | Standard Deviation |
| A statement of no difference or no relationship between variables is a ? | Null Hypothesis |
| The type of error in which one states that there is a difference between variables when in fact there isnt. | Type 1 error |
| The type of error in which one states that there isnt a difference between variables when in fact there is. | Type 2 error |
| The difference between an observed statistic from a sample and the population parameter refers to what? | Sampling Error |
| Stating that there is no difference between variables means one has accepted or rejected the null hypothesis? | Accepted |
| Stating that there is a difference between variables means one has accepted or rejected the null hypothesis? | Rejected |
| This test is used with nominal data for a small unmatched sample. | Fischer's exact test |
| This test is used with nominal data for a small matched sample. | Sign test |
| This test is used with nominal data for a large unmatched sample. | Chi Square test |
| This test is used with nominal data for a large matched sample. | McNemar's Test |
| This test is used with ordinal data when doing one comparison between two groups in an unmatched sample. | Mann-Whitney U or median test |
| This test is used with ordinal data when doing one comparison between two groups in a matched sample. | Wilcox matched-pairs signed ranks test |
| This test is used with ordinal data when doing more than one comparison between more than two groups in an unmatched sample. | Kruskai-Wallis 1 way ANOVA |
| This test is used with ordinal data when doing more than one comparison between more than two groups in a matched sample. | Friedman 2-way ANOVA |
| A parametric test for comparing two means in unmatched groups. | T-test |
| A parametric test for comparing two means in matched(correlated) groups. | Paired T-test |
| If an instrument is capable of measuring a variable with consistency it is said to have? | Test-retest reliability |
| The stability of data recorded by one individual across two or more trials is know as? | Intrarater reliability |
| Concerns with variation between two or more raters who measure the same group of subjects is know as? | Interrater reliability |
| The extent to which items measure various aspects of the same characteristic and nothing else is know as? | Internal consistency |
| When defining error, X=? | Observed score |
| When defining error, T=? | True Score |
| When defining error, E=? | the error component |
| What is the formula for the observed score(X) | X=T±E |
| What is the reliability coefficient? | T/(T+E) |
| Poor reliability = | ≤.50 |
| Moderate reliability = | .50-.75 |
| Good reliability = | ≥.75 |
| This is a reliability measure of internal consistency based on dividing the items on an instrument into two halves and correlating the results. | Split-half reliability |
| This test is used with continuous data when doing one comparison between two groups in an unmatched sample. | T-Test |
| This test is used with continuous data when doing one comparison between two groups in a matched sample. | Matched T-Test |
| This test is used with continuous data when doing more than one comparison between more than two groups in an unmatched sample. | F-test for analysis of variance with blocking for analysis of covariance. |
| This test is used with continuous data when doing more than one comparison between more than two groups in a matched sample. | F-test for analysis of variance followed by pair-wise comparison |
| Test used for ordinal data with no linear relationship. | Spearmans rho or kendalls tau |
| test used for continuous data with a linear relationship. | Pearsons correlation coefficient |
Created by:
txst fall 2008
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