[討論] 本周計經作業
感謝星潔的提醒,雖然我沒能比對兩個版本課本的差異
不過看樣子新版的第四題好像是沒有數據的,題目似乎也不同
我把舊版第四題(及相關的第二題)的題目key在下面~請大家參考
請注意alpha, beta, estimate(就是頭上那頂帽子)是我用來代替原本符號的作法
另外一些用英文不大能表達的我會改用中文,請大家見諒
Ex.4
Just as you are about to estimate a regression (due tomorrow), massive sunspots
cause magnetic interference that ruins all electricity powered machines (e.g.,
computers). Instead of giving up and flunking, you decide to calculate estima-
tes from your data (on per capita income in thousands of US dollars as a funct-
ion of the percent of the labor force in agriculture in 10 developed countries)
using methods like those used in Section 2.1.3 without a computer. Your data
are:
Country A B C D E F G H I J
-------------------------------------------------------------------------
Income 6 8 8 7 7 12 9 8 9 10
% on farms 9 10 8 7 10 4 5 5 6 7
a. Calculate the estimate of beta 0 and the estimate of beta 1.
b. Calculate R平方及調整後的R平方(R bar 平方)
c. If the percentage of the labor force in agriculture in another developed
country was 8 percent, what level of per capita income (in thousands of US
dollars) would you guess that country had?
Ex. 2
To get more practice of summation notation, use the data in Exercise 4 on Inco-
me (Y) and Percent of the labor force on farms (X) to anser the following ques-
tions.
a. 計算X總和
b. 計算Y總和
c. 計算3X的總和,它和X總和的三倍相等嗎?
d. 計算X+Y的總合,它和X的總和+Y的總和相等嗎?
另外,有興趣使用SAS的同學真的可以上計中軟體銀行(www.cc.ntu.edu.tw)下載
學習版
以上,祝大家做作業順利
昀昇上
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