作者secret113 (愛情以外的秘密...)
看板Grad-ProbAsk
標題[商管] [統計]台大96商學考古題
時間Fri Feb 12 00:37:01 2010
這一題題目很長...麻煩了
steve loves to study insects,according to his study
in his whole life, he conclude that whenever there is
one spider observed in his basement ,the stock price
of company A on that particular day would be $11;
whenever two spiders observed,stock price would be
$12,and so on.steve's observation can be exactly
formulated as(stock price of company A)=10+(number of
spiders observed in the basement). No exception has
been identified .which of the following is not
correct?
(A). stock price of company A and spoders observed in
the basement are positively correlated
(B).since the two variable are positively correlated,
steve can apply regression anaysis, and the regression
coefficient,B1, would also be positive
(C).the correlation coefficient between stock proce of
A and number of spiders observed in the basement can
not bemade even larger and larger
(D).it's likely that in the next morning when steve win the
lottery,the relationship between stock price of
spiders observed in the basement may not follow the
above formula
我是一直覺得答案是c
但是正確答案是b
另外我也不太懂d的描述為什麼會是對的
所以蟆煩大家了，謝謝!!
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◆ From: 59.117.0.85
1F：推 ayabf:應該是股票價格跟觀察的蜘蛛數量理論上是沒有相關的吧... 02/12 01:21
2F：推 SONGya168:格式請修正 02/12 01:43
3F：→ secret113:不好意思格式有誤...謝謝修正! 02/12 23:24