excel is probably the best as you can then manipulate the data very well. While excel is unfortunately not as good as some other programs for manipulation, it's good at making stuff look pretty and for simple things that's probably what you want. So yes, stick the stuff in excel and then you can bang out some graphs and stuff !
let me know if you need help with excel
~apa
Just type the stuff into the spreadsheet in a tabulated format, then when you want to plot graphs and such, select the relevant columns of the table and go insert>xy scatter