题目内容
（请给出正确答案）
Speaker A: The experiment has been completed, hasnt it？ Speaker B: ______
A．Yes. We need another week to complete it.
B．Yes. It has been completed beautifully.
C．No. It was completed last week.
D．No. I have no idea about it.
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更多“Speaker A: The experiment has been completed, hasnt it？ Speaker B: ______A．Yes. We need an”相关的问题
Which of the following is NOT mentioned as a requirement？
A．Good appearance
B．Previous experience
C．A master's degree
D．Good speaking and writing skills
本题利用WAGE1.RAW中的数据。
(i)使用OLS估计方程
(iv)exper取什么值时，工作经历的增加实际上会降低预期的log(wage)。样本中有多少人具有比该取值更长的工作经历？
The first thing George did at the training school was ______.
A. to take an experienced pilot in a plane
B. to be taken up into the air in a plane by an officer
C. to fly a commercial plane
D. to talk about his ideas
利用MRO2.RAW中的数据。
(i)利用在工作的428个妇女的数据，通过以exper、exper2、nwifeinc、age、kidsir6和kidsge6为解释变量的OLS来估计受教育的回报。报告educ的估计值及其标准误。
(ii)现在用赫克曼估计受教育的回报，其中所有外生变量都在第二阶段的回归中出现。换句话说，就是做log(wage)对educ、exper、ecper2、nwifeinc、age、kidslt6、kidsge6和入的回归。将估计的教育回报及其标准误与第(i)部分的结果相比较。
(iii)只用428个工作妇女的观测，将1对educ、exper、ecper2、nwifeinc、age、kidslt6、kidsge6回归。R2为多大？这如何有助于解释你在第(ii)部分得到的结果？(提示：考虑多重共线性。)
（本题所有的数值计算结果保留4位小数） 则调整之后的拟合优度
=___________。
What is consumers’ expectation？ (More than one answer)
A.They expect their digital experience to be more human and empathic
B.They expect their digital experience to surprise them.
C.They expect their digital experience to allow for interactivity.
D.They expect their digital experience to save money.
He was surprised that the other participants
A．were there for reasons like his.
B．were experienced climbers.
C．were in better condition than him.
然后将1og(wage对进行回归。将系数与在log(wage)对educ、exper和tenure的回归中educ的系数相比较。
考虑一个教育回报取决于工作经历多少(反之亦然)的模型：
(i)证明：保持exper不变，多受一年教育的回报(以小数表示)是β1+β3exper。
(ii)陈述如下原假设：教育的回报并不取决于exper的水平。你认为合适的备择假设是什么？
(iii)利用WAGE2.RAW中的数据，相对你给出的备择假设来检验(ii)中的原假设。
(v)令θ1表示exper=10时(以小数表示)的教育回报：θ1+10β3求出β1的估计值及其95%的置信区间.(提示：写成θ1-10β3并代入方程，然后重新整理。这就给出了得到的θ1置信区间所需做的回归。)
According to the passage, the author thinks of each interview as ______.
A．a positive experience
B．a chance to get a perfect job
C．a chance to meet challenges
D．one item in the schedule
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