Hey guys So I'm a bit stuck in this section. This is what I've got so far:
notes: I used grades_lst instead of scores the previous functions as you can tell above. It all works fine except for this last piece of code where I get this error: Oops, try again. grades_std_deviation(8.2222222222) raised an error: 'float' object is not iterable
edit: also I used grades_lst throughout the code but in the previous exercise the program converted it into 'grades' for the first three functions idk why.