What happens to statistical power when variance (e.g., variability in the scores) increases?
Power decreases |
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Power is unaffected |
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Power increases |
Solution:
Answer is
Power decreases
Explanation:
As the variance increases , the standard error increases.
Then , the absolute value of the test statistic decreases.
In this case , the chance of the null hypothesis being rejected also decreases.
The power of the test then decreases.
What happens to statistical power when variance (e.g., variability in the scores) increases? Power decreases Power...
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