题目内容
用计算器求下面平均数:
85,100,95,95,100,85,95,90,100,95.
20,24,18,22,24,20,24,28,24,26,22,20.
13.5,14.9,16.5,17.8,19.2,26.5,19.5,17.8,19.2,17.3.
(1)11 12 13 14 15 16 17 18 19
(2)435 239 389 333 285 391 293 346 404 397 351 374
(3)87 94 72 68 83 75 99 86
(4)1799 1803 1818 1817 1 796 1798 1789 1801 1796 1788
用计算器求下面一组数据的平均数.
9.9 10.3 9.8 10.1 10.4 10 9.8 9.7