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歡迎您訪問數學考題練習:我市南部山區某中學為了解本校七年級學生的體能情!

數學考題練習:我市南部山區某中學為了解本校七年級學生的體能情

更新時間:2024-01-12 16:43:17作者:貝語網校

我市南部山區某中學為了解本校七年級學生的體能情況,隨機抽查其中30名學生,測試了1分鐘仰臥起坐的次數,并繪制成如圖所示的頻數分布直方圖,請根據圖示,仰臥起坐次數在25~30次的人數為

A.3

B.5

C.10

D.12

試題答案

D

試題解析

根據頻數分布直方圖中每一組內的頻數可知道每一組的人數,從圖中可看出仰臥起坐次數在25~30次的人數為多少.

解答:因為能看出每一組的人數,所以仰臥起坐次數在25~30次的人數為12人.

故選D.

點評:本題考查讀頻數分布直方圖的能力和利用統計圖獲取信息的能力;利用統計圖獲取信息時,必須認真觀察、分析、研究統計圖,才能作出正確的判斷和解決問題.

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