arithmeticmean 9,6,9,3,5,9,6,9,4,3,9,9,5,9,6,7,7,8,8,3

解答

平均值

9, 6, 9, 3, 5, 9, 6, 9, 4, 3, 9, 9, 5, 9, 6, 7, 7, 8, 8, 3

6.7

求解步骤

计算数据集的和:

i = 1 \sum n a_{i} = 134

计算数据集中的项的数量:

n = 20

将和除以项的数量然后化简:

6.7

= 6.7

a r i t hm e t i c m e an 48, 42, 56, 64, 40, 40, 48, 42, 56, 30, 64, 48, 53

g eo m e t r i c m e an 90, 94, 53, 68, 79, 84, 87, 72, 70, 69, 65, 89, 85

6 C 2

7 c 2

s t d 57, 62, 84, 85, 88, 66, 59, 77, 78, 93