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446 points
Submitted by
Tommy Zhou
over 4 years ago
Can anyone help me? Thanks! （Solved! 100% right!!）
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 gradesaverage(grades):
sumofgrades = gradessum(grades)
average = sumofgrades / len(grades)
return average
def grades_variance(grades,average):
variance = 0
for g in grades:
variance += ((average - g) ** 2)
return variance / len(grades)
print gradesvariance(grades, gradesaverage(grades))
I do not know why my code did not work and i tried other people's solution, but it kept saying "ooops, try again".
Hope someone can give me a right solution.
Thanks
Hi,
Maybe it is your indentation?
Here is the whole code:
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)
final_variance=variance/float(len(scores))
return final_variance
print grades_variance(grades)
508 points
Submitted by
Niloufer Othman
over 4 years ago
can i ask why you decided to use two arguments in your definition for grades_variance?
here is my solution that worked, hopefully it will help you
def grades_variance(scores):
average=grades_average(scores)
variance=0
for score in scores:
variance += ((average-score)**2)
final_variance=variance/float(len(scores))
return final_variance
print grades_variance(grades)
508 points
Submitted by
Niloufer Othman
over 4 years ago
2 Comments
Tommy Zhou
over 4 years ago
Can I have the whole code, cuz it still does not work . Thank you very much.
Jack maher
over 4 years ago
Tah very much brilliant code helped me out loads
4 Comments
the instructions i got told me to use scores as an argument.
thank you very much
no problem.. i hope it worked for you this time
tanks!!!!!!!!!