某良種培育基地正在培育一種小麥新品種A,將其與原有的一個(gè)優(yōu)良品種B進(jìn)行對(duì)照試驗(yàn),兩種小麥各種植了25畝,所得畝產(chǎn)數(shù)據(jù)(單位:千克)如下

品種A357,359367,368375,388,392,399400405,414

    415,421,423,423427,430430,434443,445,451,454

品種B363,371374,383,385386,391,392,394,395,397

    397,400,401401,403,406,407410,412,415416,422,430

()完成所附的莖葉圖

()用莖葉圖處理現(xiàn)有的數(shù)據(jù),有什么優(yōu)點(diǎn)?

()通過觀察莖葉圖,對(duì)品種AB的畝產(chǎn)量及其穩(wěn)定性進(jìn)行比較,寫出統(tǒng)計(jì)結(jié)論.

答案:
解析:

  解:()

  ()由于每個(gè)品種的數(shù)據(jù)都只有25個(gè),樣本不大,畫莖葉圖很方便;此時(shí)莖葉圖不僅清晰明了地展示了數(shù)據(jù)的分布情況,便于比較,沒有任何信息損失,而且還可以隨時(shí)記錄新的數(shù)據(jù).

  ()通過觀察莖葉圖可以看出:①品種A的畝產(chǎn)平均數(shù)(或均值)比品種B高;②品種A的畝產(chǎn)標(biāo)準(zhǔn)差(或方差)比品種B大,故品種A畝產(chǎn)穩(wěn)定性較差.


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17、某良種培育基地正在培育一種小麥新品種A.將其與原有的一個(gè)優(yōu)良品種B進(jìn)行對(duì)照試驗(yàn).兩種小麥各種植了25畝,所得畝產(chǎn)數(shù)據(jù)(單位:千克)如下:
品種A:
357,359,367,368,375,388,392,399,400,405,412,414,415,421,423,423,427,430,430,434,443,445,445,451,454
品種B:
363,371,374,383,385,386,391,392,394,394,395,397,397,400,401,401,403,406,407,410,412,415,416,422,430
(1)畫出莖葉圖;
(2)用莖葉圖處理現(xiàn)有的數(shù)據(jù),有什么優(yōu)點(diǎn)?
(3)通過觀察莖葉圖,對(duì)品種A與B的畝產(chǎn)量及其穩(wěn)定性進(jìn)行比較,寫出統(tǒng)計(jì)結(jié)論.

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科目:高中數(shù)學(xué) 來源: 題型:

(本小題滿分12分)

   某良種培育基地正在培育一種小麥新品種A,將其與原有的一個(gè)優(yōu)良品種B進(jìn)行對(duì)照

試驗(yàn),兩種小麥各種植了25畝,所得畝產(chǎn)數(shù)據(jù)(單位:千克)如下:w.w.w.k.s.5.u.c.o.m       

品種A:357,359,367,368,375,388,392,399,400,405,414,

     415,421,423,423,427,430,430,434,443,445,451,454

品種B:363,371,374,383,385,386,391,392,394,395,397

        397,400,401,401,403,406,407,410,412,415,416,422,430

(Ⅰ)完成所附的莖葉圖

(Ⅱ)用莖葉圖處理現(xiàn)有的數(shù)據(jù),有什么優(yōu)點(diǎn)?w.w.w.k.s.5.u.c.o.m       

(Ⅲ)通過觀察莖葉圖,對(duì)品種A與B的畝產(chǎn)量及其穩(wěn)定性進(jìn)行比較,寫出統(tǒng)計(jì)結(jié)論。

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()(本小題滿分12分)

   某良種培育基地正在培育一種小麥新品種A,將其與原有的一個(gè)優(yōu)良品種B進(jìn)行對(duì)照

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品種A:357,359,367,368,375,388,392,399,400,405,414,

     415,421,423,423,427,430,430,434,443,445,445,451,454

品種B:363,371,374,383,385,386,391,392,394,394,395,397

        397,400,401,401,403,406,407,410,412,415,416,422,430

(I)完成所附的莖葉圖

(II)用莖葉圖處理現(xiàn)有的數(shù)據(jù),有什么優(yōu)點(diǎn)?

(III)通過觀察莖葉圖,對(duì)品種A與B的畝產(chǎn)量及其穩(wěn)定性進(jìn)行比較,寫出統(tǒng)計(jì)結(jié)論。

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(2009安徽卷文)(本小題滿分12分)

   某良種培育基地正在培育一種小麥新品種A,將其與原有的一個(gè)優(yōu)良品種B進(jìn)行對(duì)照

試驗(yàn),兩種小麥各種植了25畝,所得畝產(chǎn)數(shù)據(jù)(單位:千克)如下:.      

品種A:357,359,367,368,375,388,392,399,400,405,414,

     415,421,423,423,427,430,430,434,443,445,451,454

品種B:363,371,374,383,385,386,391,392,394,395,397

        397,400,401,401,403,406,407,410,412,415,416,422,430

(Ⅰ)完成所附的莖葉圖

(Ⅱ)用莖葉圖處理現(xiàn)有的數(shù)據(jù),有什么優(yōu)點(diǎn)?.      

(Ⅲ)通過觀察莖葉圖,對(duì)品種A與B的畝產(chǎn)量及其穩(wěn)定性進(jìn)行比較,寫出統(tǒng)計(jì)結(jié)論。

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科目:高中數(shù)學(xué) 來源: 題型:

(2009安徽卷文)(本小題滿分12分)

   某良種培育基地正在培育一種小麥新品種A,將其與原有的一個(gè)優(yōu)良品種B進(jìn)行對(duì)照

試驗(yàn),兩種小麥各種植了25畝,所得畝產(chǎn)數(shù)據(jù)(單位:千克)如下:.      

品種A:357,359,367,368,375,388,392,399,400,405,414,

     415,421,423,423,427,430,430,434,443,445,451,454

品種B:363,371,374,383,385,386,391,392,394,395,397

        397,400,401,401,403,406,407,410,412,415,416,422,430

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(Ⅱ)用莖葉圖處理現(xiàn)有的數(shù)據(jù),有什么優(yōu)點(diǎn)?.      

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