题目内容
在假设检验中，得到的P值越大，则()。
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一所中学的教务管理人员认为，中学生中吸烟的比例超过30%，为检验这一说法是否属实，一家研究机构在该地区所有中学生中抽取一个随机样本进行检验。建立的原假设和备择假设应为()。
一项研究发现，2000年新购买小汽车的人中有40%是女性，在2005年所做的一项调查中，随机抽取120个新车主中有57人为女性，在α=0.05的显著性水平下，检验2005年新车主中女性的比例是否有所显著增加，建立的原假设和备择假设分别为H0：π≤0.4；H1：π>0.4，检验的结论是()。
如果能够证明某一电视剧在播出的头13周其观众收视率超过了25%，则可以断定它获得了成功。假定由400个家庭组成的一个随机样本中，有112个家庭看过该电视剧，在α=0.01的显著性水平下，检验假设H0：π≤0.25；H1：π>0.25，所得的结论是()。
I tend to accept any idea put forward by experts on TV. One day, a sociologist proposed that the1society has been consuming modern humans little by little. For fear that I would become a victim of the consumer society. I 2hurried to a bicycle shop in my neighborhood. 3the shopkeeper Mr. Johnson was selling me the bicycle, he said, “This is the best thing you4have done. Life has become hopelessly 5. A bicycle is simple, and it brings to you 6things: fresh air, sunshine and exercise.” I agreed. Happy as a child, I got on the bicycle and headed out onto the streets. After some time, I 7at the other end of the town. I was 8that this simple vehicle could let me9long distance in a fairly short time. But how 10did I really go?Since I hated to be 11,I went back to Mr. Johnson and asked him to 12an odometer on my bicycle. He agreed, but 13,“An odometer without a speedometer is like a 14without a knife.” I admitted he wasright and in a few minutes, the two devices were 15to the handlebars of my bicycle. “What about a horn?” he then asked. “Look, this horn is no larger than a matchbox and has many 16.” Attracted by these functions, I bought the horn.“You can’t leave the back part 17.” noted Mr. Johnson. He fixed a metal box with buttons18the seat, and said, “Is there anything better than this oven when you feel 19on your way? I can give you a special discount.” I was not strong enough to 20the offer.“I congratulate you once more; this is the best thing you could have done,” said Mr. Johnson in the end.
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