Getting a general error message from my code:
Oops, try again. You did not print the correct variance. Double-check your code and make sure you print the variance!
It should print out the variance calculation. I think there may be an error with floating numbers, but I'm not clear why. Thanks.
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) aver = sum_of_grades / float(len(grades)) return aver print grades_average(grades) def grades_variance(scores): average = grades_average(scores) variance = 0 for score in scores: variance = ((average - float(score)) ** 2) + variance var = variance / float(len(scores)) return var print grades_variance(grades)