案例2生活用水調(diào)查案例

1、作業(yè)二a市自來水生活用水總量的調(diào)查一、案例背景我國是水資源缺乏的國家，開展水資源調(diào)查十分必要。調(diào)查中的 重要一項內(nèi)容是生活用水調(diào)查，因此，a市欲進(jìn)行一項生活用水調(diào)查。生活用水內(nèi)涵非常寬泛，就a市而言，涉及生活用水的用戶可 能包括：1.居民戶；2第三產(chǎn)業(yè)有關(guān)企業(yè)，主要是餐飲業(yè)、賓館、洗 車行、浴池、游泳館等。相關(guān)信息:1. a市共有居委會122個，住戶總數(shù)為31990戶，調(diào)查的內(nèi) 容包括自來水用水量，家庭人口數(shù)，洗衣機數(shù)量等；2. 商業(yè)性游泳館、洗車行、和餐館酒店在工商局有辦理營業(yè)持照的登記，但也有些小餐館屬無照經(jīng)營。二、問題討論1對上述用戶進(jìn)行調(diào)查，如何構(gòu)建抽樣框？在構(gòu)建抽樣框的基礎(chǔ)上如何抽樣

2、?2. 針對居民戶調(diào)查，假定采用二階段抽樣，即居委會一一住戶，又假定多階抽樣設(shè)計效應(yīng)為2,預(yù)調(diào)查釆用簡單隨機抽樣抽取32戶居民，利用預(yù)調(diào)查信息計算居民戶調(diào)查的總樣本量（相對誤差控制在10%）,并討論樣本量在各階段的分配；3. 假設(shè)最終調(diào)查了 130戶居民，對居民家庭用水總量進(jìn)行估計，采用什么樣的估計方法比較好，進(jìn)行具體估計，計算置信區(qū)間（95%概率度）。三、參考信息通過對32個預(yù)調(diào)查樣木的信息進(jìn)行處理，計算得到各項指標(biāo)的數(shù)據(jù)特征概況, 表1預(yù)調(diào)査樣本的各指標(biāo)數(shù)據(jù)分析情況變量指標(biāo)均值標(biāo)準(zhǔn)差變異系數(shù)家庭人口數(shù)3.131.2890.41自來水用量15.676.370.41戶擁有洗衣機數(shù)2.660.8

3、70.33表2預(yù)調(diào)査用水量與人口數(shù)、家庭擁有洗衣機數(shù)的相關(guān)關(guān)系表變量waterpopui at i onwash mach i ne自來水用量10.994*0.333家庭人口數(shù)0.994”10.358戶擁有洗衣機數(shù)0.3330.3581附錄1 預(yù)調(diào)查32個樣本單元信息no.districthouse idpopulationwaterwash machine18288522.6328322315.53314113210.03418147421. 5252239421. 3264882315.5375434315.3485682524.23962690210.221063374315. 6211

4、6452715.021265134524.821365539315.221466361315. 121567231315.041667540419.741767754524.631867803210.32196938029.84207026614.922170311420.422271560210.41237235419.83247236329.832575217524.04268265420. 3327843914.52288749419.92299958420.0430113126210.0331116259421.233211711114.81附錄2 最終調(diào)查樣本信息no.distric

5、thouse idpopulationwaterwash machine1819315.822894736.3338161315.0348174525.035820029.936828429.7378328315.0388331314.7398341315.1210836914.8111184229.92121854315.3013185615.02141879314.00151886525.831618121314.621718198315.531818279524.421918284315.322018291526.25212511315.5322252314.92232534315.53

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10、229.93附錄3 居委會戶數(shù)規(guī)模信息居委會編號戶數(shù)規(guī)模居委會編號戶數(shù)規(guī)模居委會編號戶數(shù)規(guī)模居委會編號戶數(shù)規(guī)模114232141631313941792153331436496895139313534135657179621141283517866651972215110362216788698131610337174689129913071053810169898100134838539957075910110892964013071722102152102874115272753103891125342169732041041171217243917414410583131984414075270106771443245140761431071661524846155771411081761625147150781411091621722148122791401102931829749100801571112771923550210811511121462017151130821501131502113552100831501141422225453170841501152692320354292851461162