# All Questions

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### Bootstrapping power estimates for a bootstrap test

Assume I want to use a (nonparametric) bootstrap test for a hypothesis with a sample size of $n_1$ and I already have $n_0$ actual samples on which to base my power estimates. Usually, we would also ...
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### Why set weights to 1 in confirmatory factor analysis?

I write this question with reference to an example on p138-142 of the following document: ...
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### Select best set of binary variables for clustering known sample labels

I have a set of samples, for which I know the "true groups". For this samples I have about 200 binary variables, I would like to know a method to select the subset of variables, that gives me a ...
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### Zero-mean correlation

In the following blog post: here, the author goes and calculates the alternative correlation measure for two time series. Essentially, calculates the correlation between two series by giving the mean ...
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### Determine an unknown number of real world locations from GPS-based reports

I'm working on some software which should determine real world locations (f.e. traffic jams or speed cams) from several GPS-based reports. An user will be driving when reporting a location, thus the ...