Thursday, 2 February 2012


I am now doing the ANOVA test to three main features -- percentage of higher than upper bounds, average pressure and number of overcorrection. As Excel cannot do the one-way repeated measures ANOVA,  I am learning to use SPSS.

From the book, I understand that I should firstly draw some graphs like frequency histograms to get an overview of the data before doing the intensive analysis.

I still have some problems in data normalization. I am still not sure what type of data needs normalization and which formula is the best.

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