Oops, try again. grades_variance seems to be missing!
I m not getting why this error is coming ? Plz Guide ?
grades = [100, 100, 90, 40, 80, 100, 85, 70, 90, 65, 90, 85, 50.5] def print_grades(grades): for grade in grades: print grade def grades_sum(grades): total = 0 for grade in grades: total += grade return total def grades_average(grades): sum_of_grades = grades_sum(grades) average = sum_of_grades / float(len(grades)) return grades_average def grades_variance(scores): average=grades_average(scores) variance=0 for score in scores: variance += ((average-score)**2) total = variance/float(len(scores)) return total print grades_variance(grades)