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人教版高中数学选修3离散型随机变量及其分布列(2)教学设计
温故知新 1.离散型随机变量的定义可能取值为有限个或可以一一列举的随机变量,我们称为离散型随机变量.通常用大写英文字母表示随机变量,例如X,Y,Z;用小写英文字母表示随机变量的取值,例如x,y,z.随机变量的特点: 试验之前可以判断其可能出现的所有值，在试验之前不可能确定取何值；可以用数字表示2、随机变量的分类①离散型随机变量:X的取值可一、一列出；②连续型随机变量:X可以取某个区间内的一切值随机变量将随机事件的结果数量化．3、古典概型:①试验中所有可能出现的基本事件只有有限个；②每个基本事件出现的可能性相等。二、探究新知探究1.抛掷一枚骰子,所得的点数X有哪些值？取每个值的概率是多少？ 因为X取值范围是{1，2，3，4，5，6}而且"P(X=m)"=1/6,m=1,2,3,4,5,6.因此X分布列如下表所示
人教版高中数学选修3一元线性回归模型及其应用教学设计
1.确定研究对象，明确哪个是解释变量，哪个是响应变量；2.由经验确定非线性经验回归方程的模型；3.通过变换，将非线性经验回归模型转化为线性经验回归模型；4.按照公式计算经验回归方程中的参数，得到经验回归方程；5.消去新元，得到非线性经验回归方程；6.得出结果后分析残差图是否有异常 ．跟踪训练1.一只药用昆虫的产卵数y与一定范围内的温度x有关，现收集了6组观测数据列于表中： 经计算得： 线性回归残差的平方和: ∑_(i=1)^6?〖(y_i-(y_i ) ?)〗^2=236,64,e^8.0605≈3167.其中 分别为观测数据中的温度和产卵数，i=1,2,3,4,5,6.(1)若用线性回归模型拟合，求y关于x的回归方程 (精确到0.1）；(2)若用非线性回归模型拟合，求得y关于x回归方程为 且相关指数R2＝0.9522． ①试与(1)中的线性回归模型相比较，用R2说明哪种模型的拟合效果更好 ?②用拟合效果好的模型预测温度为35℃时该种药用昆虫的产卵数.(结果取整数).
2022年辽宁省盘锦市中考英语真题（原卷版）
“Her daughter passed away a few days ago. Now,she can’t do the same things she used to do with her daughter. She doesn’t knowwhat to do. Even little things like making dinner and cleaning the house areharder for her to do now. Maybe you can think of a way to help her,” her mothersaid.
2022年湖北省武汉市中考英语真题（原卷版）
The December day started like any other. Papacame back with his boat full of fish. Mama made breakfast for the family.Seven-year-old Joonas was doing his homework, while his two little brothers ranaround the yard.
2022年辽宁省朝阳市中考英语真题（解析版）
There wasa stone lying in the mountains for a long time. He had a dream—one day he couldfly up into the sky ___11___ a bird. When he told his dream to his friends,they all laughed at him.
2022年甘肃省白银市中考英语真题（原卷版）
Chinese taikonauts Zhai Zhigang, Wang Yaping andYe Guangfu carried out the Shenzhou-13 spaceflight mission (任务) that started on Oct. 15,2021. This mission lasts 6 months, which was also a national record.
2022年甘肃省武威市中考英语真题（解析版）
All thefamily—my grandparents, my parents, my aunt and uncle, my cousin, my sister andI— ___22___ the turkey. However, turkey is not the easiestthing to ___23___. It takes a lot of time to prepare and a lot ofwork to cook…and there are a lot of chances for things to go wrong.
2022年江苏省苏州市中考英语真题（原卷版）
We’re leaving Qinghai Station. The scenery alongthe way is some of the wildest in all of China. Keep your eyes open as we racethrough this beautiful land. You might see a rare Tibetan antelope（藏羚羊）fromyour window.
2022年甘肃省天水市中考英语真题（解析版）
My mum and dad bought a nice, big turkey a fewdays before Thanksgiving. ___29___was proud of herself as she got it for a good price. ___30___ Thanksgiving, Mum got the turkey out of thefridge.
2022年湖南省邵阳市中考英语真题 （解析版）
An unexpected thing happened in the ____11____ of my eleventh year. Thehome I had ____12____inwas burned to the ground in the middle of the night. ____13____ , mymom, dad, grandma, brothers and I escaped(幸免于难).
2022年湖南省湘潭市中考英语真题（原卷版）
Fiveyears ago, Jennifer, a girl from Australia, came to Xiangtan University tostudy Chinese. There she fell in love with Chinese culture and met her husband,who is a local (当地的) young man. They got married after she finishedher study. Since then, she has started her new life in Xiangtan City.
2022年贵州省铜仁市中考英语真题（解析版）
I’m glad to receive your letter and know yourunforgettable（难忘的）experience.Now I’d like to share mine. Last Friday, I was cleaning my room and found anold photo in a drawer. While I was looking at it, the ___16___ memory of that day came back to me.
2022年贵州省贵阳市中考英语真题（解析版）
Paper cutting or tearing is a cultural traditionin China. For centuries, it has been passed down from one generation（一代人） tothe next, especially from mothers to daughters. This beautiful art created byskillful artists is used to decorate（装饰） doors, ceilings, and bedsin people’s homes, or at celebrations such as birthdays and weddings.
2022年贵州省毕节市中考英语真题（解析版）
Mr. Zhang was a cook in Canada. He ___11___ in Guangzhou, and he learned to cook in HongKong. He moved to Canada for work when he was 26 years old. Everything was goodtill COVID-19（新冠病毒）brokeout. Last year, he returned to China because the economy（经济）inCanada began ___12___down.
2022年黑龙江省龙东地区中考英语真题（解析版）
Choose the best choice fromA to F to finish the dialogue. You have one more answer. Each choice should beused only once.A: Hello, I’m a schoolnewspaper reporter. May I ask you some questions?B: ____46____
2022年黑龙江省龙东地区中考英语真题（原卷版）
B: It’s about theexperiments three astronauts are doing on the space station.A: That’s great. I’minterested in space, so I want to be an astronaut like them.
2022年黑龙江省绥化市中考英语真题（解析版）
There are many kinds ___21___art forms in China. ___22___ you often see any of them in your life?They help us understand and enjoy the traditional Chinese culture. When theSpring Festival comes, some people often ___23___ the red paper intodifferent art works with scissors.
2022年黑龙江省绥化市中考英语真题（原卷版）
Tim: _______36_______,Bob.Bob: Good afternoon, Tim. Icalled you just now, but nobody answered. _______37_______?Tim: I went to the cinema.And I watched a movie named The Battle atLake Changjin.Bob: Oh, great. It’s very famous nowadays. _______38_______?
2022年黑龙江省大庆市中考英语试题（解析版）
On a snowy day, there was a man walking in ahurry on the road. His clothes were in poor condition. You might think he was abeggar（乞丐）,but in fact he was a painter. His name was Vincent Willem van Gogh.
2022年黑龙江省哈尔滨市中考英语真题（原卷版）
I often use old clothes that people don’t wearany more to make bags. I opened a small shop in my community and set up awebsite to sell the bags online. Many customers think they are fantastic. Now Iplan to write a new book about ways to use old clothes.
