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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 corre
The following table contains the ACT scores and the GPA (grade point average) for eight college students. Grade point average is based on a four-point scale and has been rounded to
A thick walled cylinder has internal and external diameters of 120 mm and 420 mm respectively. It is made from a ductile elastic material of your choice and is used to contain hot
A store is known for is bargains. The store has the habit of lowering the price of its bargains each day, to ensure that articles are sold fast. Assume that you spot an item on Wed
a) Design a simple econometric project to identify the factors that affect the demand for a good or service of your preference. Estimate the significance of these factors using mu
I am trying to apply weighted least squares but Im not getting a very good fit when I regress the residuals on the variables so I don''t think the weights will be very good
An electron follows a helical path in a uniform magnetic field of magnitude 0.422T. The pitch of the path is 6.81 mm, and the magnitude force on the electron is 1.59 x 10 -15 N. W
The equilibrium conditions for three related markets are given by: (a)Write this system of equations in matrix notation of the form Ax = B. (b) Find the determinant
Your firm will produce widgets for the next 10 years (starting at t=1). Annual revenue from selling widgets is $20,000. Production requires an initial outlay (at t=0) for machin
Females, it is said, make 70 cents to the dollar in the United States. To investigate this phenomenon, you collect data on weekly earnings from 1,744 individuals, 850 females and
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