The error on the console shows:
Traceback (most recent call last):
File "python", line 30, in
NameError: name 'variance' is not defined
The functions above is directly from the previous few exercises, which should be correct.
However what is my mistake in the print part?
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=variance+(average - score) ** 2 results=float (variance) / len(scores) return results print grades_variance(grades) def grades_std_deviation(variance): return variance ** 0.5 variance=grades_variance(grades) print grades_std_deviation(variance) print print_grades(grades) print grades_sum(grades) print grades_average(grades) print grades_variance(grades) print grades_std_deviation(variance)