关于基本统计值的计算 

 1 #基本统计值计算
 2 def getNum():   #获取用户不定长度的输入
 3     nums = []
 4     iNumStr = input('请输入数字【回车退出】:')
 5     while iNumStr != '':
 6         nums.append(eval(iNumStr))
 7         iNumStr = input('请输入数字【回车退出】:')
 8     return nums
 9 
10 def mean(numbers):   #计算平均值
11     s = 0.0
12     for num in numbers:
13         s = s + num
14     return s / len(numbers)
15 
16 def dev(numbers, mean):  #计算方差
17     sdev = 0.0
18     for num in numbers:
19         sdev = sdev + (num - mean)**2
20         return pow(sdev / (len(numbers) - 1), 0.5)
21 
22 def median(numbers):  #计算中位数
23     sorted(numbers)
24     size = len(numbers)
25     if size % 2 == 0:
26         med = (numbers[size//2-1] + numbers[size//2])/2
27     else:
28         med = (numbers[size//2])
29     return med
30 
31 n = getNum()
32 m = mean(n)
33 print('平均值：{},方差{:.2},中位数：{}'.format(m, dev(n, m),median(n)))

 

posted @ 2023-02-16 15:21  摆烂小T  阅读(72)  评论(0)    收藏  举报