Help in exam statistice


#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_variance(scores):
    variance = 0
    average = grades_average(scores)
    for score in scores:
        variance+= (average - score) ** 2
    variance=variance/len(scores)
return variance

def grades_std_deviation(x):
    return x**0.5

 variance=grades_variance(grades)
 print grades_std_deviation(variance)

the erro said File "python", line 29

    variance=grades_variance(grades)
                                   ^
IndentationError: unindent does not match any outer indentation level

#2

There are multiple indentation issues.

  1. return has been indented outside function near grades_variance.
  2. the last two lines of your code are indented to the right by one space.