名校
1 . 某种植物感染
病毒极易导致死亡,某生物研究所为此推出了一种抗
病毒的制剂,现对
株感染了
病毒的该植株样本进行喷雾试验测试药效.测试结果分“植株死亡”和“植株存活”两个结果进行统计;并对植株吸收制剂的量(单位:
)进行统计规定:植株吸收在
(包括
)以上为“足量”,否则为“不足量”.现对该
株植株样本进行统计,其中“植株存活”的
株,对制剂吸收量统计得下表.已知“植株存活”但“制剂吸收不足量”的植株共
株.
(1)完成以
下列联表,并判断是否可以在犯错误概率不超过
的前提下,认为“植株的存活”与“制剂吸收足量”有关?
(2)若在该样本“制剂吸收不足量”的植株中随机抽取
株,求这
株中恰有
株“植株存活”的概率.
参考数据:
,其中
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7f27ebcef70a3ebbbe8d2e53ea0896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf72465888b34cacde1febb6f2ff95ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c64c3f647b318c7843f3ae465f7b91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7c64c3f647b318c7843f3ae465f7b91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b7f27ebcef70a3ebbbe8d2e53ea0896.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5453184e251cfe787b5965cd38426962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
编号 | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
吸收量![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72fcdc709e77910cd36a26369648b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/213c6487d477c3b399355b0df748a394.png)
吸收足量 | 吸收不足量 | 合计 | |
植株存活 | ![]() | ||
植株死亡 | |||
合计 | ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
参考数据:
![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bc485c58dbd6e50bfb352030f4a1c42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
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2020-03-22更新
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3卷引用:宁夏青铜峡市宁朔中学2023届高三上学期期中考试数学(文)试题