Help in Review


#1

Please help me on this

`
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)
variance1=variance/len(scores)
return variance1

print grades_variance(grades)

def grades_std_deviation(variance):
return variance ** 0.5
variance=grades_variance(grades)
print grades_std_deviation(variance)

def print_all(grades):
print_grades(grades)
grade_sum(grades)
grades_average(grades)
grades_variance(grades)
grades_std_deviation(grades_variance(grades))
`
I am getting error


#2

Did it. Completed the module


#3

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 = 0.0
for grade in grades:
total += grade
return total
print grades_sum(grades)

def grades_average(grades):
sum_of_grades = grades_sum(grades)
average = sum_of_grades / float(len(grades))
return average
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 / len(scores)
return var

print grades_variance(grades)


#4

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