Q&A: The statistics of psychology! I’ve studyed alot and cannot grasp the idea of power and whatnot. please help!?
Question by : The statistics of psychology! I’ve studyed alot and cannot grasp the idea of power and whatnot. please help!?
You read a study that just barely fails to be significant at the .05 level. that is the result is not significant. you then look at the size of the sample. if the sample is very large (Rather than small), how should this affect your interpretation of (a) the probability that the null hypothesis is actually true and (b) the probability that the null hypothesis is actually false? (c) Explain your answers to a person who understands hypothesis testing but has never learned about power.
Answer by someguy
In simplest terms, the larger the sampling the more accurate the result should be…so in theory, any result over a large sampling is more meaningful that that same result over a tiny one…
That being said, it’s still an empirical result, and doesn’t necessarily prove/disprove anything; whether a statistical approach has meaning largely depends on the problem being addressed…for example, suppose you have 10 paper cups, and you’re told that one of them has a quarter under it…turning over 1 cup and not finding a quarter proves nothing… turning over 9 cups still doesn’t prove much, since the last cup may or may not hide a quarter…Expand that model to 1000 cups, the result is basically the same…that’s an example of a problem that isn’t really statistical in nature…
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