Term
| ONE vs TWO tailed significance |
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Definition
ONE-tailed -> directional hypothesis
TWO-tailed -> nondirectional hypothesis |
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Term
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Definition
The likelihood of detecting an effect when there is actually one.
Avoid Type II error
*Key for deciding sample size |
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Term
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Definition
- Effect size
- Power
- Alpha level (level of sig.)
- Sample size
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Term
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Definition
-measure of strength of phenomenom; correlation
Therefore as correlation increases, so does effect size.
If effect is large then sample can be smaller.
As effect size increases, so does power of study.
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Term
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Definition
The higher the 'cutoff' point, the higher the power.
BUT increase in probability of Type I error |
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Term
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Definition
| As sample size increases, power increases. |
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Term
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Definition
As variability increases, power decreases.
(there might be a trend, but low stat. sig.)
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