题目
题型:不详难度:来源:
0.01,0.04,0.03,0.04,0.02,0.03,0.04,0.03,0.01,0.03.
(1)说出这组数据的众数和它的实际意义;
(2)如果国家环保局对大气飘尘的要求为平均值不超过0.025克/立方米,问该市的空气是否符合国家环保要求?
答案
(1)0.03克/立方米出现了四次,次数最多,众数为0.03克/立方米;
其实际意义是反映了空气质量状况的集中趋势.
(2)因为0.03克/立方米>0.025克/立方米,所以该市的空气不符合国家环保要求.
核心考点
试题【某校课外环保小组对本市的十个地方抽样做空气的含尘调查.数据如下(单位:克/立方米):0.01,0.04,0.03,0.04,0.02,0.03,0.04,0.0】;主要考察你对平均数等知识点的理解。[详细]
举一反三
则胡军这个学期数学总平均分为______.
(1)这30户家庭平均每户多少人?(精确到个位)
(2)已知这30户家庭的月用水量见下表: