電大實(shí)用衛(wèi)生統(tǒng)計(jì)學(xué)期末復(fù)習(xí)試題材料小抄(編輯修改稿)
2025-07-09 11:49 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 生體重，得均數(shù)為 ，標(biāo)準(zhǔn)差為 kg；出生身長(zhǎng)均數(shù) 50cm，標(biāo)準(zhǔn)差為 3cm； 試問(wèn)： 1）該研究的總體、樣本各是什么？ 2）身長(zhǎng)和體重何者變異大？抽樣誤差各為多大？ 3）該 市市區(qū) 95%的新生兒出生體重在什么范圍之內(nèi)？ 4）該市市區(qū)的新生兒出生體重的平均水平在什么范圍之內(nèi)？ 5）過(guò)去該市區(qū)的新生兒平均出生體重為 ，問(wèn)現(xiàn)在出生體重有無(wú)變化？ 計(jì)算分析題答案 1． 該資料為構(gòu)成比資料，計(jì)算醫(yī)院分娩的 116名畸形兒母親的年齡分布，在這些畸形兒中母親年齡 26歲所占的比重最大，其次為 24— 29（除 26歲以外）各年齡組（ 5分）。不能根據(jù)該資料得出 “ 母親年齡在 24— 29歲時(shí)，最容易出生畸形兒 ” 的結(jié)論（ 5 分）。若要回答哪個(gè)年齡組母親容易出生畸形兒，需要收集各年齡母親出 生的新生兒數(shù)及畸形兒資料，計(jì)算各年齡組母親的畸形兒發(fā)生率。 2． (1)建立假設(shè)檢驗(yàn)，確定檢驗(yàn)水準(zhǔn) H0穿新舊防護(hù)衣工人皮炎患病率相同，即 ∏1 ＝ ∏2 H1穿新舊防護(hù)衣工人皮炎患病率不相同，即 ∏1≠∏2 a= （ 2）計(jì)算統(tǒng)計(jì)量 x2值 T11=(1115)/43 ＝ 本例有一個(gè)理論頻數(shù)小于 5，而你 n40，故需計(jì)算校正 x2值 計(jì)算得 x2值等于 （ 3）確定 P 值，作出推斷結(jié)論 v＝（ 21）（ 21）＝ 1 查 x2 界值表本例 x2＝ ,故 P，不拒絕 H0，尚不能認(rèn)為穿新舊防護(hù)衣工人皮炎患病率不同。 3． 1）總體：某市 1999 年市區(qū)新生兒、樣本：某市 1999年市區(qū) 400名新生兒 6 2）求身高、體重的均數(shù)，標(biāo)準(zhǔn)差，標(biāo)準(zhǔn)誤。 3）求正常值范圍 4）求可信區(qū)間 5）樣本與總體均數(shù) = t檢驗(yàn) Visafree policy brings Chengdu biz, tourism boost. Making national headlines several times, Chengdu39。s 72hour visafree policy has attracted wide attention from both Chinese and foreign experts and businessmen since it took effect on Sept 1 last year. The program permits citizens from 51 countries and regions including the United States, Australia, Canada and Japan who have valid visas and flight tickets to a third country to spend three days in the city. The capital of Sichuan province is the first city in the western region of China to offer foreign tourists a threeday visa and the fourth nationwide to adopt the policy following Shanghai, Beijing and Guangzhou. Li Zhiyong, deputy dean of the tourism institute at Sichuan University, said the move contr ibutes to a large increase in the number of overseas tourists and raises the city39。s level of internationalization. The policy will also bring direct economic revenue, Li said. Chengdu has many cultural legacies and is also a paradise for panda lovers with the world39。s largest breeding and research center. Three days are long enough for foreign visitors to visit those iconic tourist spot
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