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【简答题】
With respect to the comments of Holmes and Briars concerning the mean reversion of the import data Clara Holmes, CFA, is attempting to model the importation of an herbal tea into the United States. She gathers 24 years of annual data, which is in millions of inflation-adjusted dollars. The real dollar value of the tea imports has grown steadily from $30 million in the first year of the sample to $54 million in the most recent year. She computes the following equation: (Tea Imports)t = 3.8836 + 0.9288 × (Tea Imports)t − 1 + et t-statistics (0.9328)(9.0025) R2 = 0.7942 Adj. R2 = 0.7844 SE = 3.0892 N = 23 Holmes and her colleague, John Briars, CFA, discuss the implication of the model and how they might improve it. Holmes is fairly satisfied with the results because, as she says “the model explains 78.44 percent of the variation in the dependent variable.” Briars says the model actually explains more than that. Briars asks about the Durbin-Watson statistic. Holmes said that she did not compute it, so Briars reruns the model and computes its value to be 2.1073. Briars says “now we know serial correlation is not a problem.” Holmes counters by saying “rerunning the model and computing the Durbin-Watson statistic was unnecessary because serial correlation is never a problem in this type of time-series model.” Briars and Holmes decide to ask their company’s statistician about the consequences of serial correlation. Based on what Briars and Holmes tell the statistician, the statistician informs them that serial correlation will only affect the standard errors and the coefficients are still unbiased. The statistician suggests that they employ the Hansen method, which corrects the standard errors for both serial correlation and heteroskedasticity. Given the information from the statistician, Briars and Holmes decide to use the estimated coefficients to make some inferences. Holmes says the results do not look good for the future of tea imports because the coefficient on (Tea Import)t − 1 is less than one. This means the process is mean reverting. Using the coefficients in the output, says Holmes, “we know that whenever tea imports are higher than 41.810, the next year they will tend to fall. Whenever the tea imports are less than 41.810, then they will tend to rise in the following year.” Briars agrees with the general assertion that the results suggest that imports will not grow in the long run and tend to revert to a long-run mean, but he says the actual long-run mean is 54.545. Briars then computes the forecast of imports three years into the future. Part 5) With respect to the comments of Holmes and Briars concerning the mean reversion of the import data, the long-run mean value that: A) Briars computes is correct, but the conclusion is probably not accurate. B) Briars computes is not correct, but his conclusion is probably accurate. C) Holmes computes is not correct, and her conclusion is probably not accurate. D) Briars computes is correct, and his conclusion is probably accurate.
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【多选题】下列情形成立盗窃罪的是:( )
A.
甲看见一个3 岁的小女孩乙手中拿一个钱包独自站在超市旁边,就拿出几个棒棒糖引诱乙和他交换,乙拿取了糖果,将钱包交给甲,钱包中有人民币4000 元
B.
甲因为女友丙与其分手转而与乙谈恋爱,便对乙怀恨在心。认为乙就是凭借有一辆奔驰车将丙吸引。某日甲将乙的奔驰车撬开,开到山上,推入深谷摔得粉碎
C.
甲为了讨好女友乙,在某停车场撬开一辆摩托车(价值3000 元)送给乙,乙得知该车来路不明,说不要“脏东西”,拒绝接受。甲大受刺激,一怒之下将车砸毁
D.
甲开汽车停在马路边,未熄灭发动机,然后到路对面服装店佯装买衣服,选一件名贵西服以试穿为名穿在身上,乘店员不注意迅速跑到车上,开车逃离
【单选题】法洛四联症患儿突然昏厥抽搐的常见原因是
A.
合并脑膜炎
B.
长期脑缺氧
C.
合并脑脓肿
D.
合并脑血栓
E.
肺动脉漏斗部肌肉痉挛
【多选题】本工程中属于楼地面构造做法中完成面的有( )。
A.
卫生间地砖地面
B.
20 厚木地板
C.
阳台地砖地面
D.
20 厚1:2水泥砂浆面层
E.
10 厚地砖楼梯地面
【判断题】表示准确度和精密度时,最多取两位有效数字。
A.
正确
B.
错误
【单选题】下图是甲、乙、丙三种固体物质的溶解度曲线,请你结合所给曲线,判断下列说法正确的是(  )
A.
在t 3 ℃时,甲与丙的溶解度相等。
B.
t 3 ℃时,甲物质的饱和溶液中,溶质、溶剂、溶液的质量之比为1∶2∶3
C.
t 1 ℃时,甲、乙、丙三种物质的饱和溶液中,溶质质量分数的大小关系是丙>甲>乙
D.
温度降低到t 2 ℃时,甲、乙的溶解度相等,得到甲的饱和溶液
【简答题】be动词的适当形式填空 1. —What color _______ your pencils? —They _______ blue. 2. —How ______ Frank? —He ______ fine, thanks . 3. The jackets ________ green. 4. —________ you Tony? —Yes, I _______. 5. Those ___...
【简答题】下图是甲、乙、丙三种固体物质的溶解度曲线,请根据图示填空: (1)在______℃时,甲与丙的溶解度相等。 (2)t 3 ℃时,甲物质的饱和溶液中,溶质、溶剂、溶液的质量之比为__________。 (3)t 1 ℃时,甲、乙、丙三种物质的饱和溶液中,溶质质量分数的大小关系是_____________(用“甲”、“乙”、“丙”及“>”、“<”或“=”表示)。 (4)从上图你能获得的信息有(写两条)...
【单选题】Frank: You'll never believe what I saw on the train today! Peter: What? Frank: Some guy got on with a monkey on his shoulder! Peter: You're kidding! ______ Frank: He had it on a chain, but yeah, I thi...
A.
I don't think so.
B.
That will be expensive.
C.
It must be plastic.
D.
I don't agree with you.
【多选题】下列情形成立盗窃罪的是:( )
A.
甲看见一个4岁的小孩乙手中拿一个钱包独自站在路边,就拿出一把糖果引诱乙和他交换,乙拿取了糖果,将钱包交给甲。钱包中有人民币3000无
B.
甲因为女友丙与其分手转而与乙谈恋爱,便对乙怀恨在心。认为乙就是凭借有一辆别克车将丙吸引。某日甲将乙的别克车撬开,开到山上,推入深谷摔得粉碎
C.
甲为了讨好女友乙,在某停车场撬开一辆摩托车(价值3000元)送给乙,乙得知该车来路不明,说不要“脏东西”,拒绝接受。甲大受刺激,一怒之下将车砸毁
D.
甲开汽车停在马路迫,未熄灭发动机,然后到路对面服装店佯装买衣服,选一件名贵西服以试穿为名穿在身上,乘店员不注意迅速跑到车上,开车逃离
【简答题】(2010年4月)某企业在进行组织结构设计时,根据长官意志,因事设人,随意增减机构。这一做法与组织结构设计的______是相悖的。
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