题目内容 (请给出正确答案)
提问人:网友c********1 发布时间:2023年3月31日 19:49
[单选题]

直线相关分析中,如总体相关系数ρ>0,则从总体中抽出的样本(  )。

A.r=0 B.r<0 C.r>0 D.r可大于0,等于0或小于0 E.以上都不对

参考答案
十点题库官方参考答案 (由十点题库聘请的专业题库老师提供的解答)
更多“直线相关分析中,如总体相关系数ρ>0,则从总体中抽出的样本(”相关的问题
The trams that glide through Croydon by day are evocative of continental Europe. The loud and sometimes violent drunkenness among the young people who roam this south London suburb on a Saturday night is all too British, however.That Britons tend to drink too much is nothing new. But the debate about how to curb youthful drunkenness is gaining focus, in part because of recent reminders that the violence it produces can go beyond clumsy late-night fights. On August 17th, three youths in Gateshead were convicted of beating a man into a month-long coma for refusing to buy alcohol for their underage friends. Peter Fathy, the chief constable of Cheshire, where a father of three was murdered on August 10th by youths, has suggested, among other things, raising the legal drinking age from 18 to 21 and banning alcohol consumption in public places. These proposals sound plausible but they have drawbacks. It would put Britain out of line with international practice: the buying age is 18 in most of Europe, and as low as 16 in countries without much of a drink problem, such as Italy. In any case, binge-drinkers in their mid-twenties are also part of the problem.As for banning drinking in public places, local authorities in Britain can already do this. Two particularly enthusiastic councils are Westminster in London and Brighton and Hove on the south coast, both of which have raucous" night-time economies. Other councils apply the ban more selectively. An alternative to restrictive measures is to teach Britons more sensible drinking habits. After all, government campaigns and public health advertisements played some role in the decline in smoking. But Ben Baumberg, a researcher at the Institute for Alcohol Studies, cautions against pinning too many hopes on this approach. By itself, he says, it will not revolutionise Britain"s binge-drinking culture.A surer solution is to raise the cost of alcohol by increasing taxes. Grant Thornton, an accountancy firm, points out that taxes on alcohol have fallen in real terms over the past decade, although they are still high by European standards. Intense competition between the pubs and bars in town centres has also pushed down prices. Drinkers stumble from one watering hole to the next in search of "happy hours" and other promotions. Supermarkets are also accused of selling alcoholic beverages.The government may be about to change course. Its previous strategy to counter excessive alcohol consumption was criticized for relying too heavily on voluntary action by the drinks industry. But ministers said in June that they would review the pricing and promotion of alcohol. Raising the cost of drinking is the best hope of making a Saturday night in Croydon more peaceful.
A.Raising the legal drinking age.B.Banning alcohol consumption in public places.C.Placing public health advertisements.D.Raising taxes on alcoholic drinks.
点击查看答案
绿色革命内容是指()。
A . 绿色食品工程
B . 绿化荒地工程
C . 以采用农作物高产良种为中心的一场新技术革命
D . 植树造林工程
点击查看答案
对球直径明确的焊接球允许偏差的检验方法,采用卡钳及游标卡尺检查,每个球量测各三个数值。
A . 正确
B . 错误
点击查看答案
根据现行《火灾自动报警系统设计规范》,火灾发展迅速,产生大量热、烟和火焰辐射的场所,可选择()
A . 感温探测器
B . 感烟探测器
C . 火焰探测器
D . 以上探测器的组合
点击查看答案
根据公司法律制度的规定,下列人员中,可以担任公司的董事、监事或者高级管理人员的是()。
A.甲所负债务数额较大且到期未清偿 B.乙因贪污罪被判处刑罚,执行期满3年 C.丙的年龄不满18周岁但学识渊博 D.担任破产清算公司的董事并对公司破产负有个人责任的,自公司破产清算完结之日已满5年
点击查看答案
单位内控规范的创新点可以简单概括为(),从单位层面与业务层面同时进行管控。
A.以资金管控为主线,以信息系统为核心
B.以预算管理为主线,以信息系统为核心
C.以预算管理为主线,以资金管控为核心
D.以资金管控为主线,以会计控制为核心
点击查看答案
降低色彩中纯度的方法,不包括()。
A . 混合白色而降低纯度
B . 混合黑色而降低纯度
C . 同时混合黑色与白色而降低纯度
D . 提高色差而降低纯度
点击查看答案
高压给水泵单级泵头扬程能达到25米,5级泵头扬程能达到()。
A.25米
B.50米
C.125米
D.250米
点击查看答案
设一两个自由度体系有两个质量相同的质点,其两个主振型为:( )http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/9062046b36db4072b6df3967be8f2d8d.png
点击查看答案
()以下何人是定静师太的关门弟子?
A.仪清
B.仪和
C.秦绢
D.郑萼
点击查看答案
当场处罚()由公安消防机构办案人员一人实施。
A . A、可以
B . B、应当
C . C、必须
D . D、不得
点击查看答案
某医院组织全院职工参加义务献血活动。急诊科年轻护士甲、乙、丙均报名参加。《献血法》规定,负责组织献血工作的机构是()
A.地方各级人民政府
B.县级以上人民政府
C.地方各级卫生行政部门
D.地方各级采供血机构
E.行业协会
点击查看答案
3、嘌呤核苷酸的从头合成途径特点是:
A. 在磷酸核糖分子上逐步合成嘌呤核苷酸 B. 先合成IMP再转化成AMP和GMP C. 不受产物反馈抑制 D. 肝脏是从头合成嘌呤核苷酸的最主要器官
点击查看答案
某日,李某进入A小区王某家实施盗窃,后被在家中午睡的王某妻子张某发现,李某遂持刀威胁张某让其不要声张,并将张某逼至卧室,张某进入卧室后将门反锁向楼下呼救,李某见势不妙便逃走。此时,李某构成()。
A.抢夺罪
B.抢劫罪
C.侵占罪
D.诈骗罪
点击查看答案
“碧毯线头抽早稻,____”出自白居易的《春题湖上》。
点击查看答案
客服
TOP