grades = [100, 100, 90, 40, 80, 100, 85, 70, 90, 65, 90, 85, 50.5]
def print_grades(grades_input):
for grade in grades_input:
print grade
def grades_sum(scores):
total = 0
for score in scores:
total += score
return total
def grades_average(grades_input):
sum_of_grades = grades_sum(grades_input)
average = sum_of_grades / float(len(grades_input))
return average
def grades_variance(scores):
average = grades_average(scores)
variance = 0
for score in scores:
variance += (average - score) ** 2
return variance / len(scores)
def grades_std_deviation(variance):
return variance ** 0.5
print_grades(grades)
print grades_sum(grades)
print grades_average(grades)
print grades_variance(grades)
print grades_std_deviation(grades_variance(grades))
"""
NOTE: You can improve the output if you want it.
print 'Grades: ', print_grades(grades) # Starting by modifying this function
print 'Sum of grades: %s' % grades_sum(grades)
print 'Average grade: %s' % grades_average(grades)
print 'Variance: %s' % grades_variance(grades)
print 'Standard deviation: %s' % grades_std_deviation(grades_variance(grades))
"""