arithmeticmean 3,12,9,5,8,4,10,9

解答

平均值

3, 12, 9, 5, 8, 4, 10, 9

7.5

求解步骤

计算数据集的和:

i = 1 \sum n a_{i} = 60

计算数据集中的项的数量:

n = 8

将和除以项的数量然后化简:

7.5

= 7.5

s t d 13, 10, 12, 1, 9, 10, 8

c (4, 1)

s t d 1, 3, 4, 5, 5, 6, 8, 9, 9, 12, 13, 18

13 n C r 7

s t d 44, 50, 38, 96, 42, 47, 40, 39, 46, 50