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Hi, I have probably overlooked something obvious, but could anybody help me with following, please? Trying to make regression analysis. I have a huge dataframe with results from National Opinion Survey on Crime and Justice (www.abacon.com/fox/) with two variables G5 and N3 which are imported to R as ordered factors: > levels(noscj$G5) [1] "Strongly agree" "Agree" "Neither" [4] "Disagree" "Strongly disagree" > levels(noscj$N3) [1] "Serious...

Hi, I have a SPSS datafile which is used for my textbook in the statistics (and which is available on http://abacon.com/fox/s6720p2.sav, but it is originally from ICPSR). When I opened it with SPSS 10 and run Frequencies on it I have got 979 valid data a 27 missing. However, see below (unfortunately, I have used R in preparation of my homework, which caused me an error on this): > data=read.spss("s...