arithmeticmean 2,4,4,5,6,6,7,8,12

解答

平均值

2, 4, 4, 5, 6, 6, 7, 8, 12

6

求解步骤

计算数据集的和:

i = 1 \sum n a_{i} = 54

计算数据集中的项的数量:

n = 9

将和除以项的数量然后化简:

6

= 6

m e d ian 3, 5, 2, 1, 4

10 n P r 6

v a r ian ce - 25, 2, 3, 3, 8, 10, 12, 14, 18, 21, 21

18 C 2

a r i t hm e t i c m e an 6, 7, 8, 9, 10