# Questions tagged [estimation]

For questions about estimation and how and when to estimate correctly

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### Estimate of the variance of the point estimator

This is probably a very stupid question, but I tried everything and look all over different topics and forums, i just don't get it. A poll of 1500 registered voters is taken. Of these, 600 say they ...
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1 vote
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### Combine two position estimates with different accuracies

Hi smart people of StackExchange! I have a question regarding the combination of two position estimates (X and Y coordinates) where each position estimate has a different certainty/accuracy. Example I ...
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### Least Square algorithm between two vectors

I have a vector $y \in \mathbb{C}^{N \times 1}$ and it expressed as $y = H\times s$, where $H$ is diagonal $N \times N$ matrix to be estimated and $s \in \mathbb{C}^{N \times 1}$. So I formulated ...
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### Interpolating noisy measurements taking into account derivative bounds

For context, I have a target moving in space which I am able to locate using vision sensors. I end up obtaining $M$ noisy samples of the trajectory $[x(t), y(t)]$ for some time instants $\{t_k\}$. ...
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### Consistently estimate the covariance matrix with weakly correlated observations

Suppose there are T k-dimensional observations following the generating process: $Y_t = \mu + \epsilon_t$, where $\mu$ is the mean and $\epsilon$ is a weak stationary error with zero mean and time-...
1 vote
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### How to solve simultaneous equations of the form $\frac{a}{x}+\frac{b}{y}=1$ really fast?

Context: Taking the major and minor axes of an ellipse as the $x$ and $y$ axes respectively find the equation of the ellipse passing through the points $(1,\sqrt{6})$ and $(3,0)$. Taking the major ...
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### K-NN regression

I am new to data mining algorithms, and am currently covering the basics of K-Nearest Neighbors for regressions rather than classification. I get that in the 'simple' version of K-NN, the value of a ...
1 vote