What is the total derivative of the function f(x,y) = ln(x+y), where ln() denotes the natural logarithmic function?
Which of the following can induce a 'multicollinearity' problem in a regression model?
The gradient of a function f(x, y, z) = x + y2 - x y z at the point x = y = z = 1 is
Consider two securities X and Y with the following 5 annual returns:
X: +10%, +3%, -2%, +3%, +5%
Y: +7%, -2%, +3%, -5%, +10%
In this case the sample covariance between the two time series can be calculated as:
TESTED 15 May 2024
