题目
题型:不详难度:来源:
A.0.1,0.3,0.5,0.2 | B.0.2,0.3,0.25,0.3 | ||||||||
C.
| D.0.15,0.25,0.35,0.25 |
答案
B、0.2+0.3+0.25+0.3=1.05≠1,不符合题意;
C、
1 |
5 |
2 |
5 |
2 |
5 |
1 |
5 |
D、0.15+0.25+0.35+0.25=1,符合题意.
故选D.
核心考点
试题【下列各组数可以作为权数的是( )A.0.1,0.3,0.5,0.2B.0.2,0.3,0.25,0.3C.15,25,25,15D.0.15,0.25,0.3】;主要考察你对平均数等知识点的理解。[详细]
举一反三