The varience


#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_varience(scores):
    average = grades_average(scores)
    varience = 0
    for score in scores:
        varience += (average - score) ** 2
        a = varience / float(len(scores)
    return a
print grades_varience(grades)

The error : 
              
               File "python", line 24
    return a
         ^
SyntaxError: invalid syntax


what is wrong with my return????

#2

Remove the float() method and it will work!


#3

There is a problem here ...

a = varience / float(len(scores)

The parentheses are not closed.

Also note that Codecademy is expecting the function to be named grades_variance, rather than grades_varience. The correction needs to be made in several places. Use the spelling variance instead of varience for the name of the variable.


#4

@papusalaatti @appylpye
Thanks guys. stupid problem :l


#5

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