RMG 700 Lecture Notes - Lecture 7: Null Hypothesis, Minimax, Histogram
12 Apr 2016
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Describing stats in general: mean, median, standard deviaion (normal distribuion), skewness (normal distribuion), range (max/min), count, mode. Histogram: is the frequency of distribuion, what is your frequency level, Correlaion: extent to which two variables are related direcionally. Perfect formaion means increase in one variable means increase in another variable. One tail (when you know what direcion it could go, but not by how much): Type 1 error: rejecing the null when it is actually true (false posiive). Type 2 errors: null is false but we fail to reject it. allows for only one direcion to be considered. Mean 1 is hypothesized to be only larger or smaller than a speciic mean 2. Two tail (when you don t know which direcion it could go): allows for both direcions to be considered. We do no know which direcion it could go. Mean 1 is hypothesized to be smaller/larger than a speciied mean 2.
