For an exercise I am asked to calculate an integral with a monte carlo simulation, after that I need to optimize the results with a control variate. This was the given integral:
$\int_0^1 \! \frac{\sin(1-x)}{\sqrt[3]{x}} \, \mathrm{d}x.$
As far as I understand, this isn't that hard. Especially since this is an integral with domain [0,1]. I basically only need to generate a U(0,1) variable, insert this in the follwing formula and in the end take the average result as my solution.
$\frac{\sin(1-x)}{\sqrt[3]{x}}$
However, I am now asked to introduce a control variate to optimize my result. In my understanding, a control variate is another stochastic variable of which the expected value is known. I don't know however what the criteria are when you are searching for a control variate.
For example: in the example of control variates of wikipedia they chose $g(x)=1+x$ as a control variate for $f(x)=\frac{1}{1+x}$. Is this a good control variate because it is a simplified version of the original integral?
