Questions tagged [example]

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Examples of positive definite periodic covariance matrices

My aim is to find a few examples of positive definite covariance matrices $\pmb{R} = \{R(s,t)\}_{s,t=1}^n$ that satisfy $$R(s,t) = R(s+T, t+T),~~~1\leq s,t \leq n-T,$$ where $T$, $1\leq T\leq n-1$, is ...
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Am I understanding correctly the Maximum Entropy concept using a sentence?

In the sentence "The house is white", each word carries a different amount of information. If I remove the "The" from the sentence, almost nothing happens: you are still able to ...
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23 views

What scenario corresponds to choosing the “true distribution” $p$ in $\textsf{KL}(p\parallel q)$?

I understand that when you think about changing $q$ in the Kullback-Leibler divergence $\textsf{KL}(p\parallel q)$, this corresponds to trying to find the distribution that minimizes information loss ...
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How to use parameters to calculate a value which will be used for a statistical analysis?

I am confused on a basic statistics concept. Also, my terminology may be a bit off as well; I am a novice. I will be as simple and concise as possible. Hopefully, this scenario gets to the core of my ...
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What is the probability of Jack finding Sam at the last bar?

Jack and Sam are friends. It is Saturday and Sam forgot his phone home. Jack knows that there is a 2/3 probability that Sam goes to a party. There are 10 clubs in town and all have an equal ...
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68 views

What are the first historical examples of meta-analysis?

I am researching the history of meta-analysis, and have found several interesting scholarly sources, going O'Rourke to Hedges, just to name two recent ones. On top of these authoritative sources, I ...
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8 views

R: Any implementation of Weighted-average least squares (WALS) estimators?

I just stumbled upon Weighted-average least squares (WALS) estimators. One of the authors refer to a Matlab and Stata package, but is anyone aware of an implementation/example/package in R? Thanks in ...
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1answer
72 views

where can I find advanced stats questions and answers like the example below?

I am at the beginning of an advanced stats course and I am looking to practice some questions beyond the few which are given in class. below are a few examples from our first assignment. I am looking ...
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2k views

Real world practical Outliers/Anomalies

I want to have some real life and practical examples for anomalies that can be expressed like a scenario. For example in a country following left-hand driving, a vehicle moving in a wrong direction ...