Standard Deviation


#1



https://www.codecademy.com/courses/python-intermediate-en-7mgOa/2/2?curriculum_id=4f89dab3d788890003000096#


i am getting an error saying def is incorrect syntax and "variance" is not defined.


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
        total = variance / float(len(scores))
    return total

print grades_variance(grades)

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


#2

That's because your variance variable is indented under a function.


#3

oh my god... thank you so much lol.


#4

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