(1)把这组数据从小到大排列为0.01,0.01,0.02,0.03,0.03,0.03,0.03,0.03,0.04,0.04,0.04,0.05, 故中位数是0.03(g/m3). 出现次数最多的数据是0.03g/m3,所以众数是0.03g/m3.
(2)∵平均数=(0.01+0.01+0.02+0.03+0.03+0.03+0.03+0.03+0.04+0.04+0.04+0.05)÷12=0.03 (g/m3), ∵0.03 g/m3>0.025 g/m3 ∴这天该城市的空气不符合要求. |