Exam Statistics [v1.0]

""" Exam Statistics [v1.0] This simple Python script computes the following: - All the students' grades - The sum of all the grades - The average of the grades together - The variance of the grades - The standard deviation of the grades """ 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) result = float(variance) / len(scores) return result def grades_std_deviation(variance): return variance ** 0.5