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歡迎您訪問數學考題練習:以下適合全面調查的是!

數學考題練習:以下適合全面調查的是

更新時間:2024-01-12 16:26:39作者:貝語網校

以下適合全面調查的是

A.了解全國七年級學生的視力情況

B.了解一批燈泡的使用壽命

C.了解一個班級的數學考試成績

D.了解涵江區的家庭人均收入

試題答案

C

試題解析

本題需要根據具體情況正確選擇普查或抽樣調查等方法,并理解有些調查是不適合使用普查方法的.

解答:①了解全國七年級學生的視力情況;調查范圍大,只能用抽樣調查的方法.

②了解一批燈泡的使用壽命,調查過程帶有破壞性,只能采取抽樣調查,而不能將整批燈泡全部用于實驗.

③了解一個班級的數學考試成績,調查范圍小,實施全面調查簡便易行,且又能得到較準確的數據.

④如果為了解涵江區的家庭人均收入,就對所有家庭進行一次全面的調查,費大量的人力物力是得不嘗失的,采取抽樣調查即可.

故選C.

點評:本題考查了抽樣調查和全面調查的區別,選擇普查還是抽樣調查要根據所要考查的對象的特征靈活選用,一般來說,對于具有破壞性的調查、無法進行普查、普查的意義或價值不大時,應選擇抽樣調查,對于精確度要求高的調查,事關重大的調查往往選用普查.

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