This community-built FAQ covers the “The Variance” exercise in Codecademy’s lessons on Python.
FAQs for the Codecademy Python exercise The Variance:
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Hi, I’ve got 2 slightly different versions of the code here, Example 1 works, Example 2 gives a different number. Any help why this is would be much appreciated! (again, I’m sorry the indents don’t show up)
Thank you!
Alex
def grades_variance(scores):
average = grades_average(scores)
variance = 0
for score in scores:
variance += (average - score) ** 2
return variance / len(scores)
print grades_variance(grades)
def grades_variance(scores):
average = grades_average(scores)
variance = 0
for score in scores:
variance += (average - score) ** 2
variance = variance / len(scores)
return variance
print grades_variance(grades)
Hi Alex,
I tried the below code, although I’m not if it’s the best way!
def grades_variance(scores):
>>average = grades_average(scores)
>>variance = 0
>>for score in scores:
>>>>score = (average - score) ** 2
>>>>variance += score
>>result = variance / len(scores)
>>return result
This returns a variance value of “334.071005917”.
Hope this helps!