Need to find the MEAN of Col 6 based on the value of Col 5 (Col 5 is 0/1)
If I understand your question correctly: 


First you need to import your spreadsheet into python with csv module. 
Then you need "for" loop to sum all your col per person. 
Calculate mean of each obs. 
If result greater than half of total number, get to your student 1 ;else get them 0 .
I have a spreadsheet with 10 columns and 727 obs. Col 5 is 0/1 whether a student is economically disadvantaged or not. I need to find the mean of Col 6 (test score) based on whether the student is economically disadvantaged or not. Help!