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【简答题】
某单位研究代乳粉营养价值时，用大白鼠作实验，得到大白鼠进食（X）和体重增加量（Y）的数据如下， 鼠号 1 2 3 4 5 6 7 8 进食量X（g） 800 780 720 867 690 787 934 750 体重增量Y（g) 185 158 130 180 134 167 186 133 采用Excel软件做散点图、添加趋势线的结果图。图携带的信息为：y=0.261x-47.353，R2=0.7291，（1）判断x、y是否存在显著的线性关系；（2）如果有显著的线性关系，写出关系式；（3）进食量为多少，增重可以达到170？ 可能用上的数据表—r值表 df 单0.1 0.05 0.025 0.01 0.005 双0.2 0.1 0.05 0.02 0.01 5 0.5509 0.6694 0.7545 0.8329 0.8745 6 0.5067 0.6215 0.7067 0.7887 0.8343 7 0.4716 0.5822 0.6664 0.7498 0.7977 8 0.4428 0.5494 0.6319 0.7155 0.7646 可能用上的数据：r0.05(6)=0.7067，r0.01(6)=0.8343；r0.05(7)=0.666，r0.01(7)=0.798
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【单选题】Task 3 Car servicing is something that every car owner has to experience at least sometime of the year. The best method to service your car is to go to your car service station and have the servicing ...
A.
To service your car by yourself.
B.
To have your car serviced at the service station.
C.
To turn to other car owners for help.
D.
To send your car back to the car maker.
【简答题】自主学习任务单
【简答题】Passage 1 Car servicing is something that every car owner has to experience at least some time of the year. The best method to service your car is to go to your car service station and have the servic...
【单选题】某随机试验每次试验的成功率为p(0＜p＜1)，则在3次重复试验中至少失败1次的概率为( )
A.
(1-p) 3
B.
1-p 3
C.
3(1-p)
D.
(1-p) 3 +p(1-p) 2 +p 2 (1-p)
【单选题】Task 1 Read the following passage and answer the questions. Car servicing is something that every car owner has to experience at least some time of the year. The best method to service your car is to ...
A.
To service your car by yourself.
B.
To turn to other ear owners for help.
C.
To send your ear back to the car maker.
D.
To have your car serviced at the service station.
【单选题】Task 13 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace> Car servicing is something that every car owner has to experience at least sometime of the year. The best method to serv...
A.
To service your car by yourself.
B.
To have your car serviced at the service station.
C.
To turn to other car owners for help.
D.
To send your car back to the car maker.
【简答题】每次试验的成功率为p(0＜p＜1)，重复进行10次试验，其中前7次都未成功，后3次都成功的概率为____________ .
【单选题】每次试验的成功率为p(0A.(1－p)2B.1－p2C.3(1－p)D.1－p3
A.
每次试验的成功率为p(0＜ｐ＜１） A.(1-p) 2
B.
1-p 2
C.
3(1-p)
D.
1-p 3
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