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2. Horvitz–Thompson estimator - Wikipedia

   en.wikipedia.org/wiki/Horvitz–Thompson_estimator

   In statistics, the Horvitz–Thompson estimator, named after Daniel G. Horvitz and Donovan J. Thompson, [1] is a method for estimating the total [2] and mean of a pseudo-population in a stratified sample by applying inverse probability weighting to account for the difference in the sampling distribution between the collected data and the a target population.

3. Inverse probability weighting - Wikipedia

   en.wikipedia.org/wiki/Inverse_probability_weighting

   An alternative estimator is the augmented inverse probability weighted estimator (AIPWE) combines both the properties of the regression based estimator and the inverse probability weighted estimator. It is therefore a 'doubly robust' method in that it only requires either the propensity or outcome model to be correctly specified but not both.

4. Algorithms for calculating variance - Wikipedia

   en.wikipedia.org/wiki/Algorithms_for_calculating...

   Therefore, a naïve algorithm to calculate the estimated variance is given by the following: Let n ← 0, Sum ← 0, SumSq ← 0. For each datum x: n ← n + 1. Sum ← Sum + x. SumSq ← SumSq + x × x. Var = (SumSq − (Sum × Sum) / n) / (n − 1) This algorithm can easily be adapted to compute the variance of a finite population: simply ...

5. 7 Beautiful and Inexpensive Kitchen Countertop Ideas ... - AOL

   www.aol.com/7-beautiful-inexpensive-kitchen...

   Another popular kitchen countertop idea on a budget is tile. Tile is as economical as laminate—especially if you opt for ceramic or porcelain, which range from $5 to $30 per square foot. If your ...

6. M-estimator - Wikipedia

   en.wikipedia.org/wiki/M-estimator

   The statistical procedure of evaluating an M-estimator on a data set is called M-estimation. The "M" initial stands for "maximum likelihood-type". More generally, an M-estimator may be defined to be a zero of an estimating function. [2][3][4][5][6][7] This estimating function is often the derivative of another statistical function.

7. Countertop - Wikipedia

   en.wikipedia.org/wiki/Countertop

   Countertop. A countertop, also counter top, counter, benchtop, worktop (British English) or kitchen bench (Australian or New Zealand English), bunker (Scottish English) is a raised, firm, flat, and horizontal surface. They are built for work in kitchens or other food preparation areas, bathrooms or lavatories, and workrooms in general.