I receive an error: 'Oops, try again. It looks like not all grades were printed! Make sure you are printing ech one on their own line.' However, I have printed all the grades were printed on separate lines.
It should work perfectly. Please help.
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 average def grades_variance(scores): average = grades_average(scores) variance = 0 for score in scores: variance += (average - score) ** 2 return variance / float(len(scores)) def grades_std_deviation(variance): return variance ** 0.5 variance = grades_variance(grades) print grades print grades_sum(grades) print grades_average(grades) print grades_variance(grades) print grades_std_deviation(variance)