#Q2 quiz_marks = [] total = 0 mark = float(input("Enter a quiz mark (negative number to stop): ")) while mark >= 0: quiz_marks.append(mark) total += mark mark = float(input("Enter a quiz mark (negative number to stop): ")) n = len(quiz_marks) mean = total / n variance = 0 for mark in quiz_marks: variance += (mark - mean) ** 2 variance /= n print("Mean:", mean) print("Variance:", variance)
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