一、单选题(本大题共8小题,每小题5分,共40分,答对得满分,答错不得分)
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A . 0
B .
C . 1
D .
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5.
(2024高一下·南宁期末)
某校高一、高二、高三年级各有学生数分别为800、 1000、 800 (单位:人),现用分层抽样的方法抽取一个容量为n的样本了解网课学习情况,样本中高一学生的人数为48人,那么此样本的容量n为( )
A . 108
B . 96
C . 156
D . 208
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6.
(2024高一下·江阳期末)
已知圆柱的上、下底面的中心分别为O
1 , O
2 , 过直线O
1O
2的平面截该圆柱所得的截面是面积为8的正方形,则该圆柱的表面积为( )
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A . 5,
B . 5,2
C . 3,2
D . 3,
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二、多选题(本大题共3小题,每小题6分,共18分,全部答对得满分,部分答对得部分分,答错不得分)
三、填空题(本大题共3小题,每小题5分,共15分,答得满分,答错不得分)
四、解答题(本题共5小题,共77分.解答应写出文字说明、证明过程或演算步骤)
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(2)
求
![](//math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmo%3E%7C%3C%2Fmo%3E%3Cmover+accent%3D%22true%22%3E%3Cmi%3Ea%3C%2Fmi%3E%3Cmo%3E%E2%86%92%3C%2Fmo%3E%3C%2Fmover%3E%3Cmo%3E%2B%3C%2Fmo%3E%3Cmover+accent%3D%22true%22%3E%3Cmi%3Eb%3C%2Fmi%3E%3Cmo%3E%E2%86%92%3C%2Fmo%3E%3C%2Fmover%3E%3Cmo%3E%7C%3C%2Fmo%3E%3C%2Fmrow%3E%3C%2Fmath%3E)
与
![](//math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmo%3E%7C%3C%2Fmo%3E%3Cmover+accent%3D%22true%22%3E%3Cmi%3Ea%3C%2Fmi%3E%3Cmo%3E%E2%86%92%3C%2Fmo%3E%3C%2Fmover%3E%3Cmo%3E%E2%88%92%3C%2Fmo%3E%3Cmover+accent%3D%22true%22%3E%3Cmi%3Eb%3C%2Fmi%3E%3Cmo%3E%E2%86%92%3C%2Fmo%3E%3C%2Fmover%3E%3Cmo%3E%7C%3C%2Fmo%3E%3C%2Fmrow%3E%3C%2Fmath%3E)
.
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(1)
求
![](//math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmo%3E%E2%88%A0%3C%2Fmo%3E%3Cmi%3EA%3C%2Fmi%3E%3Cmi%3EP%3C%2Fmi%3E%3Cmi%3EC%3C%2Fmi%3E%3C%2Fmrow%3E%3C%2Fmath%3E)
;
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17.
(2024高一下·南宁期末)
某调研小组调查了某市1000名外卖骑手平均每天完成的任务量(简称“单量”),得到如下的频数分布表:
单量/单 | ![](//math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmfenced+close%3D%22%29%22+open%3D%22%5B%22%3E%3Cmrow%3E%3Cmn%3E10%3C%2Fmn%3E%3Cmo%3E%2C%3C%2Fmo%3E%3Cmn%3E15%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmfenced%3E%3C%2Fmrow%3E%3C%2Fmath%3E)
| ![](//math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmfenced+close%3D%22%29%22+open%3D%22%5B%22%3E%3Cmrow%3E%3Cmn%3E15%3C%2Fmn%3E%3Cmo%3E%2C%3C%2Fmo%3E%3Cmn%3E20%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmfenced%3E%3C%2Fmrow%3E%3C%2Fmath%3E)
| ![](//math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmfenced+close%3D%22%29%22+open%3D%22%5B%22%3E%3Cmrow%3E%3Cmn%3E20%3C%2Fmn%3E%3Cmo%3E%2C%3C%2Fmo%3E%3Cmn%3E25%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmfenced%3E%3C%2Fmrow%3E%3C%2Fmath%3E)
| ![](//math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmfenced+close%3D%22%29%22+open%3D%22%5B%22%3E%3Cmrow%3E%3Cmn%3E25%3C%2Fmn%3E%3Cmo%3E%2C%3C%2Fmo%3E%3Cmn%3E30%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmfenced%3E%3C%2Fmrow%3E%3C%2Fmath%3E)
| ![](//math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmfenced+close%3D%22%29%22+open%3D%22%5B%22%3E%3Cmrow%3E%3Cmn%3E30%3C%2Fmn%3E%3Cmo%3E%2C%3C%2Fmo%3E%3Cmn%3E35%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmfenced%3E%3C%2Fmrow%3E%3C%2Fmath%3E)
| ![](//math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmfenced+close%3D%22%29%22+open%3D%22%5B%22%3E%3Cmrow%3E%3Cmn%3E35%3C%2Fmn%3E%3Cmo%3E%2C%3C%2Fmo%3E%3Cmn%3E40%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmfenced%3E%3C%2Fmrow%3E%3C%2Fmath%3E)
| ![](//math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmfenced+close%3D%22%29%22+open%3D%22%5B%22%3E%3Cmrow%3E%3Cmn%3E40%3C%2Fmn%3E%3Cmo%3E%2C%3C%2Fmo%3E%3Cmn%3E45%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmfenced%3E%3C%2Fmrow%3E%3C%2Fmath%3E)
| ![](//math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmfenced+close%3D%22%29%22+open%3D%22%5B%22%3E%3Cmrow%3E%3Cmn%3E45%3C%2Fmn%3E%3Cmo%3E%2C%3C%2Fmo%3E%3Cmn%3E50%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmfenced%3E%3C%2Fmrow%3E%3C%2Fmath%3E)
| ![](//math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmfenced+close%3D%22%29%22+open%3D%22%5B%22%3E%3Cmrow%3E%3Cmn%3E50%3C%2Fmn%3E%3Cmo%3E%2C%3C%2Fmo%3E%3Cmn%3E55%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmfenced%3E%3C%2Fmrow%3E%3C%2Fmath%3E)
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人数 | 100 | 120 | 130 | 180 | 220 | 150 | 60 | 30 | 10 |
![](//tikupic.21cnjy.com/ct20241o/a0/2f/a02f9ad5ed424ab87b1b5ab92777119c.png)
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(1)
补全该市1000名外卖骑手每天单量的频率分布直方图;
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(2)
根据图表数据,试求样本数据的中位数(精确到0.1);
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(3)
根据外卖骑手的每天单量,参考某平台的类别将外卖骑手分成三类,调查获知不同类别的外卖骑手开展工作所投入的装备成本不尽相同,如下表:
日单量/单 | ![](//math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmfenced+close%3D%22%29%22+open%3D%22%28%22%3E%3Cmrow%3E%3Cmn%3E0%3C%2Fmn%3E%3Cmo%3E%2C%3C%2Fmo%3E%3Cmn%3E20%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmfenced%3E%3C%2Fmrow%3E%3C%2Fmath%3E)
| ![](//math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmfenced+close%3D%22%29%22+open%3D%22%5B%22%3E%3Cmrow%3E%3Cmn%3E20%3C%2Fmn%3E%3Cmo%3E%2C%3C%2Fmo%3E%3Cmn%3E40%3C%2Fmn%3E%3C%2Fmrow%3E%3C%2Fmfenced%3E%3C%2Fmrow%3E%3C%2Fmath%3E)
| ![](//math.21cnjy.com/MathMLToImage?mml=%3Cmath+xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F1998%2FMath%2FMathML%22%3E%3Cmrow%3E%3Cmfenced+close%3D%22%29%22+open%3D%22%5B%22%3E%3Cmrow%3E%3Cmn%3E40%3C%2Fmn%3E%3Cmo%3E%2C%3C%2Fmo%3E%3Cmo%3E%2B%3C%2Fmo%3E%3Cmi+mathvariant%3D%22normal%22%3E%E2%88%9E%3C%2Fmi%3E%3C%2Fmrow%3E%3C%2Fmfenced%3E%3C%2Fmrow%3E%3C%2Fmath%3E)
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类别 | 普通骑手 | 精英骑手 | 王牌骑手 |
装备价格/元 | 2500 | 4000 | 4800 |
根据以上数据,估计该市外卖骑手购买装备的平均成本.
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