Python programming

Lab 17

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 = 0for grade in grades:

total += gradereturn 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 = 0for score in scores:

variance += (average - score) ** 2

var = variance / float(len(scores))return var

def grades_std_deviation(variance):return variance ** 0.5

variance = grades_variance(grades)

print "All of grades:", print_grades(grades)print "Sum of grades: ", grades_sum(grades)print "Average grade: ", grades_average(grades)print " Variance: ", grades_variance(grades)print "Standard Deviation: ", grades_std_deviation(variance)