9.review


#1

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(grades):
variance = 0
for g in grades:
variance += ((grades_average(grades) - g) ** 2)
return variance / len(grades)
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)

It looks like not all grades were printed! Make sure you are printing ech one on their own line.


#2

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