<transcript><audio_472>european social serving and they have a thousand a thousand variables with fifty thousand people you plot the correlation tables and then something comes out significant and you say hooray now i can write a paper on this but this</transcript><transcript><audio_473>is not hooray you've explored and you found something but you don't know how reliable this is and with a 50 000 people in a data set everything will come out as significant if you have a correlation of 0.001 it becomes a significant so</transcript><transcript><audio_474>p-value isn't really uh very interpretable and also large data sets have have problems but there's a real problem of using p-values when when you look at exploratory research so let's say that you found something here some effect that you want</transcript><transcript><audio_475>to look at then you do conformatory research and then you have a hypothesis so let's say you found this hypothesis from exploratory research on one data set and then you look at a different data set and test your hypothesis and then</transcript><transcript><audio_476>you do all sorts of things in order to control the type 1 error the type 2 so you need to look at p values and the power you have sufficient sample in order to test this hypothesis</transcript> european social serving and they have a thousand a thousand variables with fifty thousand people you plot the correlation tables and then something comes out significant and you say hooray now i can write a paper on this but this is not hooray you've explored and you found something but you don't know how reliable this is and with a 50 000 people in a data set everything will come out as significant if you have a correlation of 0.001 it becomes a significant so p-value isn't really uh very interpretable and also large data sets have have problems but there's a real problem of using p-values when when you look at exploratory research so let's say that you found something here some effect that you want to look at then you do conformatory research and then you have a hypothesis so let's say you found this hypothesis from exploratory research on one data set and then you look at a different data set and test your hypothesis and then you do all sorts of things in order to control the type 1 error the type 2 so you need to look at p values and the power you have sufficient sample in order to test this hypothesis
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