電大社會統(tǒng)計學(xué)試卷a及答案解析資料參考(1)-免費閱讀
【正文】 s natural scenery. Pleasant Goat and Big Big Wolf【喜洋洋與灰太狼】 Pleasant Goat and Big Big Wolf (Chinese:喜羊羊與灰 太狼 ) is a Chinese animated television series. The show is about a group of goats living on the Green Pasture, and the story revolves around a clumsy wolf who wants to eat them. It is a popular domestic animation series and has been adapted into movies. Nezha Conquers the Dragon King（ Chinese: 哪吒鬧海） is an outstanding animation issued by the Ministry of Culture in 1979 and is based on an episode from the Chinese mythological novel Fengshen Yanyi. A mother gave birth to a ball of flesh shaped like a lotus bud. The father, Li Jing, chopped open the ball, and beautiful boy, Nezha, sprung out. One day, when Nezha was seven years old, he went to the nearby seashore for a swim and killed the third son of the Dragon King who was persecuting local residents. The story primarily revolves around the Dragon King39。s animation outpouring that are not to be missed. Let39?；貧w分析具有推理的性質(zhì)，而相關(guān)分析從本質(zhì)上講只是對客觀事物的一種描述，知其然而不知其所以然。將削減誤差比例記為 PRE。 （ 對 ） 進(jìn)行區(qū)間估計，置信水平總是預(yù)先給定的 。 A B C D 。 A 400 個學(xué)生 B 每一個學(xué)生 C 400 個學(xué)生的成績 D 每一個學(xué)生的成績 只與一個自由度有關(guān)的是（ A ） A 2? 分布 B 超幾何分布 C 泊松分布 D F 分布 將總體按與研究有關(guān)的標(biāo)志進(jìn)行分組，然后再隨機(jī)地從各組中抽選單位組成樣本。 A．正偏 B．負(fù)偏 C．對稱 D．不能作出結(jié)論 分析統(tǒng)計資料，可能不存在的平均指標(biāo)是（ A ）。 （錯 ） 隨機(jī)變量在相同的條件下進(jìn)行觀測，其可能實現(xiàn)的值不止一個。 （錯 ） 三、簡答題： 5*7=35 分 大數(shù)規(guī)律 大數(shù)規(guī)律是隨機(jī)現(xiàn)象出現(xiàn)的基本規(guī)律，它的一般意義是：觀察過程中每次取得的結(jié)果可能不同（因為具有偶然性），但大量重復(fù)觀察結(jié)果的平均值卻幾乎接近某個確定的數(shù)值。相關(guān)程度越高，回歸預(yù)測越準(zhǔn)確。取顯著性水平 ?=，檢驗該雜志讀者群 中女性的比例是否為 80%？ H0 ： ? = 80% H1 ： ? ? 80% ? = n = 100 檢驗統(tǒng)計量 : 1 0 0)( ??????z 結(jié)論 : 沒有證據(jù)表明 “該雜志聲稱讀者群中有 80%為女性 ”的看法正確 有四個品牌的彩電在五個地區(qū)銷售，為分析彩電的品牌 (因素 A)和銷售地區(qū) (因素 B)對銷售量是否有影響，對每個品牌在各地區(qū)的銷售量取得以下數(shù)據(jù)，見下表。t want to steal food like other mice. Shuke became a pilot and Beita became a tank driver, and the pair met accidentally and became good friends. Then they befriended a boy named Pipilu. With the help of PiPilu, they cofounded an airline named Shuke Beita Airlines to help other animals. Although there are only 13 episodes in this series, the content is very pact and attr
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