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 | classified data | | grouped data | |
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| 1. | from the information in this table , we can easily compute an estimate of the value of the mean of this grouped data
根据表中的资料可以计算出这个分组资料平均数的一个估计值。
| | 2. | the information collected in population censusesby - censuses is vital to government planning and policy formulation , particularly in such fields as education , housing , transport , medical and social services . data on small areas form the basis of district development and service planning programmes of the government , while comprehensive information on population sub - groups , such as the elderly and single parent families , facilitates the planning of welfare policy and social service programmes
普查搜集所得的资料，对政府在规划和制订政策尤为重要，特别是有关教育、房屋、交通、医疗和社会服务的政策。小区人口资料是政府制订地区发展和服务计划的基础；而详细人口分组资料例如独居老人、单亲家庭等，更可大大帮助政府策划特定的福利政策和社会服务计划。
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