def median(numbers):

    sorted_numbers = sorted(numbers)
    list_length = len(sorted_numbers)

    if ((list_length % 2) == 0):
        answer = (sorted_numbers[list_length/2] + sorted_numbers[(list_length/2) - 1] / 2.0)
    else:
        answer = sorted_numbers[list_length/2]

    return answer