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  Liao HW 3 2-11 We have data on 82 luminosities with four different treatments. geneexpression= read.delim ( http://sites.williams.edu/rdeveaux/files/2014/09/Gene-Expression.txt ) The first treatment that will be discussed here is the highdose treatment. Here's thesummary of the highdose treatment: with ( subset (geneexpression,Treatment== Highdose ), summary (Luminosity))## Min. 1st Qu. Median Mean 3rd Qu. Max. ## 12.9 23.5 46.4 54.0 72.7 135.0 with ( subset (geneexpression,Treatment== Highdose ), boxplot (Luminosity)) The spread of the highdose treatment is very small compared to the other treatments (noticethe numbers on the y-axis) and there are no outliers.The second treatment is Control 1. with ( subset (geneexpression,Treatment== Control 1 ), boxplot (Luminosity))  with ( subset (geneexpression,Treatment== Control 1 ), summary (Luminosity))## Min. 1st Qu. Median Mean 3rd Qu. Max. ## 15.8 102.0 255.0 395.0 492.0 1480.0 The spread of the Control 1 treatment is large compared to the highdose treatment butrelatively small compared to the Control 3 treatment. There are 3 outliers.The third treatment is Control 2. with ( subset (geneexpression,Treatment== Control 2 ), boxplot (Luminosity)) with ( subset (geneexpression,Treatment== Control 2 ), summary (Luminosity))## Min. 1st Qu. Median Mean 3rd Qu. Max. ## 20.2 107.0 318.0 439.0 663.0 2030.0 The spread of the Control 2 treatment is a little bit larger than that of Control 2 but stillrelatively small when compared to that of Control 3. There is 1 outlier.The last treatment is Control 3. with ( subset (geneexpression,Treatment== Control 3 ), boxplot (Luminosity))  with ( subset (geneexpression,Treatment== Control 3 ), summary (Luminosity))## Min. 1st Qu. Median Mean 3rd Qu. Max. ## 67.1 186.0 388.0 874.0 1490.0 3010.0 The spread of the Control 3 treatment is that largest of all but it has no outliers.Below are the same set of data but summarized and graphed with log(Luminosity) insteadof Luminosity. with ( subset (geneexpression,Treatment== Highdose ), boxplot ( log (Luminosity))) with ( subset (geneexpression,Treatment== Highdose ), summary ( log (Luminosity)))## Min. 1st Qu. Median Mean 3rd Qu. Max. ## 2.56 3.16 3.84 3.72 4.29 4.90 with ( subset (geneexpression,Treatment== Control 1 ), boxplot ( log (Luminosity)))  with ( subset (geneexpression,Treatment== Control 1 ), summary ( log (Luminosity)))## Min. 1st Qu. Median Mean 3rd Qu. Max. ## 2.76 4.63 5.54 5.42 6.20 7.30 with ( subset (geneexpression,Treatment== Control 2 ), boxplot ( log (Luminosity))) with ( subset (geneexpression,Treatment== Control 2 ), summary ( log (Luminosity)))## Min. 1st Qu. Median Mean 3rd Qu. Max. ## 3.01 4.67 5.75 5.47 6.50 7.62 with ( subset (geneexpression,Treatment== Control 3 ), boxplot ( log (Luminosity)))
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