性别 | 速度 | 合计 | |
快 | 慢 | ||
男生 | 65 | ||
女生 | 55 | ||
合计 | 110 | 200 |
(2)现有n
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e5e07bf129b073f37b553fbca100172.png)
(i)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be604061cf1591f7069472269d4c9719.png)
(ii)求证:这n根绳子恰好能围成一个圈的概率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f34a85a61fcc926833ed2775f376541.png)
附:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c1698cf3a31568a8ff6f6d4ee280e8.png)
0.100 | 0.050 | 0.025 | 0.010 | |
k | 2.706 | 3.841 | 5.024 | 6.635 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6c7567972273b4ba733b47bf9d5408.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
(1)若该地区男性患者36人,请列出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72fcdc709e77910cd36a26369648b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83caa0ad94044a1e206b1cc0b3f85080.png)
(2)某药品研发公司欲安排甲乙两个研发团队来研发此疾病的治疗药物.两个团队各至多安排2个接种周期进行试验.甲团队研发的药物每次接种后产生抗体的概率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20c11f6c800b8e0410674a0c6d307d26.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ca664b1e82da6f50064a76fe118aa80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8610232c77741a37463feba1a66c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a20929b6b11f8c09ac0f53fe5f1cd77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72583e4cbf9e64cf692ecf600983fdee.png)
附:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3821f70c08c5180e9b3086d3c9610f.png)
![]() | 0.10 | 0.05 | 0.01 | 0.005 | 0.001 |
![]() | 2.706 | 3.841 | 6.635 | 7.879 | 10.828 |
①男生所占比例为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358d1067c81a8f997a4d457088a769d5.png)
②不喜欢体育锻炼的学生所占比例为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b267e290d2db301797edd8afef98afc7.png)
③喜欢体育锻炼的男生比喜欢体育锻炼的女生多50人.
(1)完成
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72fcdc709e77910cd36a26369648b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83caa0ad94044a1e206b1cc0b3f85080.png)
性别 | 体育锻炼 | 合计 | |
喜欢 | 不喜欢 | ||
男 | |||
女 | |||
合计 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5f1e5d29de6e4d72bfed62d9c14dde5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1f9fabbbe61a759e52ec975215e2e7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26308ea6d8f321d27acbd7f9b131f9f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9faccaa71316eb97aaf56af15365425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccdfce3e1a14a3c03fb83779afeb6ab2.png)
(ⅱ)对于随机事件
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b2a3318f82fec39c53c0e4fea00f75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/440b506283eb35a094656087e7c9e4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccdfce3e1a14a3c03fb83779afeb6ab2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7721b52eede0a6aedbf38f33fab04df8.png)
参考公式及数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2187714e660234f0b72f2b47d3ea685a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
0.10 | 0.05 | 0.010 | 0.001 | |
2.706 | 3.841 | 6.635 | 10.828 |
4 . 某医科大学科研部门为研究退休人员是否患痴呆症与上网的关系,随机调查了市100位退休人员,统计数据如下表所示:
患痴呆症 | 不患痴呆症 | 合计 | |
上网 | 16 | 32 | 48 |
不上网 | 34 | 18 | 52 |
合计 | 50 | 50 | 100 |
(1)依据
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bdaf501302beeec9d077be02909e3bd.png)
(2)从该市退休人员中任取一位,记事件A为“此人患痴呆症”,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21778974e8491fe2a158e70b459217be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2711c7b65695a8c8dc9750f62c97f98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a7ff8a868880b6f722b23d86b7f6b90.png)
(i)证明:;
(ⅱ)利用抽样的样本数据,估计的值.
附:,其中
.
0.050 | 0.010 | 0.001 | |
3.841 | 6.635 | 10.828 |
(1)一个兴趣小组发现,来自不同的城市的游客选择出行的习惯会有很大差异,为了验证这一猜想该小组进行了研究.请完成下列
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b72fcdc709e77910cd36a26369648b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c93f43c77e96f7f0cc838495752f9363.png)
单位:人
出行方式 | 国际大都市 | 中小型城市 | 合计 |
偏好地铁 | 20 | 100 | |
偏好其他 | 60 | ||
合计 | 60 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10568a2de2af70297d21d830c0c974db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ffb021aa7d5a5c2f0691e337caad624.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e5cfb0d2cf24c1da7ba972e0218a974.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9535a7edca53b75da329a80ad09a10c0.png)
①试证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca813bdd89fa2fdaccf2123c80b7508.png)
②设第
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ce603aa3abcb61750d2191aaa13dddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e727bd61ff43fe654f6532abe939b85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62f5ecc4fca65a5c3de73ca554a26545.png)
附:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f503f0dec4cf2cc95ad9521c5eaf9f18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
0.050 | 0.010 | 0.001 | |
3.841 | 6.635 | 10.828 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c6c7567972273b4ba733b47bf9d5408.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
(1)若依据小概率值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0255cd2084765f7019367ff6e575b9d6.png)
(2)某药品研发公司欲安排甲乙两个研发团队来研发此疾病的治疗药物.两个团队各至多排2个接种周期进行试验.甲团队研发的药物每次接种后产生抗体的概率为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29c8578f06897aa6fb84aa95c797d3d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f93a232c88870d213a7b74a796a1ff4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d9b426bcc34a2cca2184dc1310f5e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b829d3ded5f93007d3ba22f2a862efe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a20929b6b11f8c09ac0f53fe5f1cd77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72583e4cbf9e64cf692ecf600983fdee.png)
参考公式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3821f70c08c5180e9b3086d3c9610f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
参考数据:
α | 0.10 | 0.05 | 0.010 | 0.005 | 0.001 |
2.706 | 3.841 | 6.635 | 7.897 | 10.828 |
发病 | 没发病 | 合计 | |
接种疫苗 | 8 | 16 | 24 |
没接种疫苗 | 17 | 9 | 26 |
合计 | 25 | 25 | 50 |
(2)从该地区此动物群中任取一只,记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21778974e8491fe2a158e70b459217be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852fb0554ef431b4fbb9d4e92495aa34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13f6f902cd4948f93250bdf2769e358e.png)
(ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57671bb1eef2edaab351f832ca01db08.png)
(ⅱ)利用抽样的样本数据,给出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4ed0c25bdca9d500e1704a97ecda80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8817b34c320a3003fac3ac6e8a78f38c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/957893cf7210e66bd614e9e00dc9ff5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2187714e660234f0b72f2b47d3ea685a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
0.050 | 0.010 | 0.001 | |
3.841 | 6.635 | 10.828 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
黄色蜂蜡罐 | 褐色蜂蜡罐 | |
![]() | 80 | 40 |
![]() | 100 | 20 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ead9d6ff51996f3ebace6f212e11a9e4.png)
(2)假设要计算某事件的概率
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108ab49f370919e730e3567070deee65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23627eed2b79e5efc7f3fd8ea97e86c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/226c29780e3ec0ebc7250a380ef9a480.png)
(ⅱ)研究发现,①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7294f5ae2a24ff42e84cd9773b2a7287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
男 | 女 | 合计 | |
喜爱 | 30 | 40 | |
不喜爱 | 40 | 60 | |
合计 | 50 | 100 |
(2)从观众中任选一人,A表示事件“选中的观众为男性”,B表示事件“不喜欢篮球运动”.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1479dfd814fc27be3ddec595bd7c3184.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cbc7007308a2e16e535faf4de2107df.png)
①证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5de76a7326dde37d33ebe6c09b208056.png)
②利用男观众的数据统计,给出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c8d8f50fdbfc2ac51d7fe0e8eabf64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc87db2fb8ae7a2d86cffd4000fe9077.png)
附:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2187714e660234f0b72f2b47d3ea685a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/356b05e46b10ee51c3e43546d73ec96c.png)
![]() | 0.010 | 0.005 | 0.001 |
![]() | 6.635 | 7.879 | 10.828 |
性别 | 身高 | 合计 | |
低于170cm | 高于170cm | ||
女 | 14 | 7 | 21 |
男 | 8 | 11 | 19 |
合计 | 22 | 18 | 40 |
附:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3821f70c08c5180e9b3086d3c9610f.png)
α | 0.1 | 0.05 | 0.01 | 0.005 | 0.001 |
2.706 | 3.841 | 6.635 | 7.879 | 10.828 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e7dda2bd9e27f3d55aa1a6bbf9e4baa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f69f9d49a77386a3356e4a4379533df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83edd2ae4c6e9485efe492898519d78a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/739491c4c7f9b31ba25ecca8d06acbdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa0274e4937ca8c0849acf23dbc25252.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/112c3d8da72927ea01b14627d1f6d088.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f69f9d49a77386a3356e4a4379533df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/739491c4c7f9b31ba25ecca8d06acbdc.png)