I have the following data which show some values before and after a drug. I want to test whether the drug increased the mean. I think I should use Wilcoxon test, but I don't know what to do with missing values (NAs). Do I need to remove NAs and corresponding before values?
before after
2.2 NA
8.2 5.2
9.5 NA
10.5 4
12.5 6
10.5 3
9.7 10
11.5 NA
Best Answer
I think you should remove the data with NA though the data set is already very small, i don't believe you can make an inference and hypotize some values if you are studying the drug for the first time.