std 12,6,7,3,15,10,18,5

解答

标准差

12, 6, 7, 3, 15, 10, 18, 5

5.20988 \dots

求解步骤

计算方差:

27.14285 \dots

计算

σ (X) = i = 1 \sum n \frac{( x _{i} - x ˉ ) ^{2}}{n - 1} : 5.20988 \dots

5.20988 \dots

10 c 3

s t d 340, 75, 123, 259, 151

g eo m e t r i c m e an 8, 1

11 C 8

s t d 8, 16, 24, 65, 40