：（1）如圖：
（2）由頻數(shù)折線圖,得（19×6+20×7+21×9+22×12+23×8+24×6）÷48=1035÷48=21.5625,
所以這位面粉批發(fā)商每星期進(jìn)面粉21.6噸比較合適．
一位面粉批發(fā)商統(tǒng)計了前48個星期的銷售量（單位：噸）：
一位面粉批發(fā)商統(tǒng)計了前48個星期的銷售量（單位：噸）：
24.4,19.1,22.7,20.4,21,22.8,20.9,21.8,18.6,24.3,20.5,19.7,23.5,21.6,19.8,20.3,21.9,22.3,21.4,19.2,23.5,20.5,22.1,22.7,23.2,21.7,21.1,23.1,23.4,23.3,21,24.1,18.5,21.5,24.4,22.6,21,20,20.7,21.5,19.8,19.1,19.1,22.4請將數(shù)據(jù)適當(dāng)分組,列出頻數(shù)分布表,畫出頻數(shù)分布直方圖和頻數(shù)折線圖,并分析這位面粉批發(fā)商每星期進(jìn)面粉多少噸合適?
24.4,19.1,22.7,20.4,21,22.8,20.9,21.8,18.6,24.3,20.5,19.7,23.5,21.6,19.8,20.3,21.9,22.3,21.4,19.2,23.5,20.5,22.1,22.7,23.2,21.7,21.1,23.1,23.4,23.3,21,24.1,18.5,21.5,24.4,22.6,21,20,20.7,21.5,19.8,19.1,19.1,22.4請將數(shù)據(jù)適當(dāng)分組,列出頻數(shù)分布表,畫出頻數(shù)分布直方圖和頻數(shù)折線圖,并分析這位面粉批發(fā)商每星期進(jìn)面粉多少噸合適?
數(shù)學(xué)人氣：637 ℃時間：2020-09-25 13:09:57
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