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  1. Lukan27

    Doing correct backwards elimination with interaction terms?

    I'm wondering about this, and I can't find an answer anywhere. My textbook (Agresti and Finlay 2009) clearly says how to do backwards elimination on a linear model, but I'm sitting in a situation my textbook doesn't explain. Neither was I able to find anything on Google or this forum, about this...
  2. Lukan27

    Help on interpreting linear regression

    Help on interpreting linear regression estimates I'm currently working on a larger assignment, and I need some input how to interpret the results from my/a linear regression. I'm pretty sure I get it right, but as a precautionary measure some input would be lovely. I've websearched and...
  3. Lukan27

    CSV-file with random 8-digit integers

    Hi. I'm looking for some help I simply can't get my head (or Google) around. I'm trying to create a CSV-file with 250 entries, all with a semi-random 8-digit number. Here's the catch, the first number must be a 2, eg. 2******x, 250 times. I'm pretty close to do it with this code...
  4. Lukan27

    Question on the functions of R matrices

    I'm currently learning R, and starting out with the manual. I've made it to 5.3 Index matrices, and met this: > x <- array(1:20, dim=c(4,5)) > x [,1] [,2] [,3] [,4] [,5] [1,] 1 5 9 13 17 [2,] 2 6 10 14 18 [3,] 3 7 11 15 19 [4,] 4 8 12...
  5. Lukan27

    Interpretting Levene's test (Stata)

    I looked this up quite a bit, and found alot about it, but I'm still not entirely sure if I got it right. I just recently got an assignment back with some needed corrections; this one is about Levene's test and t-test. My lecturer wants me to do a Levene's test (robvar in Stata), and I get these...
  6. Lukan27

    Bar graph sorted by sex shown in means

    Hi, new to the forum. I'm beginning to love statistics, but Stata is a pain in a certain place, mostly my head. But it's part of my curriculum. Everything is going fine, but I simply cannot figure out how to make a bar chart with my index variable seperated by sex, shown in means...