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a) Explain what is calculated by a correlation coefficient.b) Why do economists commonly find regression a more useful tool than correlation?c) In a sample of 102 men the correlation among age and monthly donations to charity is found to be 0.2.Test whether this correlation is significantly among from zero and comment on your result.
If in some country personal consumption expenditures in a specific year are $50 billion, purchases of stocks and bonds are $30 billion, net exports are -$10 billion, government pur
The tab-delimited text file contains daily stock prices for the Brazilian petroleum company Petrobras from 31 December 2008 to 31 December 2009. The data were obtained from yahoo f
if there is no autocorrelation what will be done
Costs. a. Complete the following table. Total Product (Q) Total Fixed Cost Total Variable Cost Total Cost Average Fixed Cost
Given the demand function Qd = 650-5P-P2 where P=10 Find out the price elasticity of demand.
cost benefit decision invest in college undergraduate 5 years
The following table gives data on the Consumer Price Index (CPI) and the Standard & Poor (S&P) company''s index of 500 common stock prices. Year CPI Index S&P 500 Index 1978 65.2 9
Process economics questions for assignment
the demand for blankets has been estimated y^=0.5-1.5x2+3.0x3
The firm is considering manufacturing a second product in its factory alongside the first. The demand functions for the two products are: Q d1 =180 - 4P 1 Q d2 =90
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