<PLEASE USE THE FOLLOWING TEMPLATE TO HELP YOU CREATE A GREAT POST!>

<Below this line, add a link to the EXACT exercise that you are stuck at.>

<In what way does your code behave incorrectly? Include ALL error messages.>

Error message: Oops, try again. grades_variance([3, 7, 8, 1, 3]) returned 0.392 instead of the expected: 7.04

Outcome in the terminal: 29.4812243969

None

<What do you expect to happen instead?>

I really do not see anything with the code below. Any help would be appreciated.

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:

squared_diff = (average - score) ** 2

variance = variance + squared_diff

return_function = variance/len(scores)

return return_function

print grades_variance(grades)

`<do not remove the three backticks above>`