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now make variables for inverse items It easy to do it [Maximum value among response +1] - [actual response values] for example, someone response item 1 as 2, in Likert scale(5) change the value 2 to 4(6-2=4) But.. How do I know which item is inversed? there are three way to check first, Check the GuideBook about the item. item developer would write about it second, Check correlation among items ..

It's good to see you again In this chpater, I tried to make a variable Firtst, load a dataset(whatever you use) check my dataset.. 2590 objects, and 378 variables in data now, make a variable by 'apply' function how to use it? apply(dataset[,column number:column number],1,mean) dataset : set your data [,column number:column number] : becareful 'comma' place and select column number for variable ..

I'm trying to practice statistics method using Rstudio. 1. Resources for study What I used resource is form here https://www.nypi.re.kr/archive/eps NYPI Youth and Children Data Archive Advancement ofYouth Policy National Youth Policy Institute will lead the way www.nypi.re.kr 2. Loading data in Rstudio It's pretty simply click 'Import Dataset' there are some taps From Test, Excel, Spss, SAS, Sat..