I think there is a small typo in the equation of the variance
There is a subscript in the estimator suggesting that it would be the estimator for a stratum, while the text is telling us that it is the formula for the overall estimator
The screenshot below shows the subscript to be removed
I think there is a small typo in the equation of the variance There is a subscript in the estimator suggesting that it would be the estimator for a stratum, while the text is telling us that it is the formula for the overall estimator
The screenshot below shows the subscript to be removed
https://pbr-book.org/4ed/Monte_Carlo_Integration/Improving_Efficiency#StratifiedSampling