Please help me!
I am doing logistics regression model analysis (https://stats.idre.ucla.edu/r/dae/logit-regression/) and need to install the: install.packages("packagename")
However, I got the message:
Warning in install.packages :
package ‘packagename’ is not available (for R version 3.3.3)
I also try to install:
but it still didn't work!
Please give me advice how to fix the problem!