Term
| Assumptions for all Inferential Tests/Statistics |
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Definition
1-Random Sampling
2-Independent Measurements |
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Term
| Assumptions for Parametric Tests |
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Definition
1-Random Sampling
2-Independent Measurements
3-Assume Normality |
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Term
| Assumptions for Non Parametrics |
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Definition
1-Random Sampling
2-Independent Measurements
3-Variables at least ordinal |
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Term
| Assumptions for t-tests and ANOVA |
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Definition
1-Random Sampling
2-Independent Measurements
3-Assume Normality
4-Equal Variance |
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Term
| Assumptions for all correlations and regressions |
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Definition
1-Random Sampling
2-Independent Measurements
3-Assume Normality
4-Equal Variance
5-Linearity Assumed (via scatterplot) |
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Term
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Definition
| y=Alpha+BetaX+Epsilon (A-intercept, B-slope, E-error) |
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Term
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Definition
| >.05, not significant, fail to reject null, equal variance assumed < or equal to .05, significant, reject null, equal variance not assumed |
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Term
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Definition
| Measure of dispersion of a sample |
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Term
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Definition
| Measure of dispersion/spread of a series of samples |
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Term
WHICH TEST:
A continuous variable, normal; greater than one mutually exclusive group |
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Definition
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Term
WHICH TEST:
Non-continuous variable, skewed variable/distribution, small group; ranks >2 group (like ANOVA) |
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Definition
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Term
WHICH TEST:
Test one variable against a sample/distribution |
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Definition
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Term
WHICH TEST:
Comparing two mutually exclusive groups based on one variable |
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Definition
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Term
WHICH TEST:
Tests one variable before/after and pre/post |
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Definition
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Term
WHICH TEST:
Non-continuous variable, skewed variable/distribution, small group; ranks 2 groups (like independent t-test) |
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Definition
Mann Whitney U
-significance assessed through "EXACT (n<20)
-significance assessed through "Asymptotically" (n>20) |
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Term
WHICH TEST:
Designed to tell which group(s) are significantly different |
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Definition
| Post-Hoc test (least conservative to most conservative LSD-Tukey-Bonferroni-Scheffe) |
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Term
WHICH TEST:
Attempts to explain 'y' with 'x.' Dependent variable must be continuous. |
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Definition
Regression
[SSregression (results explained %)=TSS-SSresidual (results not explained)] |
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Term
WHICH TEST:
Range between -1,1. Does not specify dependent/independent. Assesses ASSOCIATION, through DIRECTION, STRENGTH |
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Definition
Correlation (not causation)
[WithinSumsofSquares=TSS-BetweenSumsofSquares] |
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