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Questions tagged [terminology]

Usage and meaning of specific technical words/concepts in statistics.

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Use of expression “statistically significantly predicts” based on in-sample analysis

Suppose one estimates a linear time series model $$y_t=\beta_0+\beta_1 x_{t-1}+\varepsilon_t$$ and finds that $\hat\beta_1>0$ and the $p$-value associated with $\hat\beta_1$ is lower than the ...
26 views

Does the function $H(a) \equiv \mathbb{P}(f_X(X) \geqslant a)$ have a name? (If it doesn't, what is a *good* name for it?)

Given a random variable $X$ with density function $f_X$, we can define the function $H$ as: $$H(a) \equiv \mathbb{P}(f_X(X) \geqslant a) \quad \quad \text{for all } a \geqslant 0.$$ This function ...
173 views

Use of expression “statistically significantly positive”

Suppose one estimates a linear model $$y=\beta_0+\beta_1 x+\varepsilon$$ and finds that $\hat\beta_1>0$ and the $p$-value associated with $\hat\beta_1$ is lower than the chosen significance ...
11 views

What is this kind of chart is this (shows flow of components from one group to another)? [duplicate]

I'd like to know the name for the following type of chart. I see it in the context of interactive charts related to fundraising or polling where components are shown to follow from one group to ...
373 views

Why is Elastic Net called Elastic Net?

What is the etymology of "Elastic Net" in Elastic Net Regularization? Does it have anything to do with the name of "lasso"?
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Reason for Precision and Recall terminology?

Why are the statistical indicators Precision and Recall named that way? Is there a canonical interpretation?
28 views

Support of a function

What is the support of some function $F$ and why do we care about it? Is it of major significance for distribution functions?
4k views

Is there a name for the phenomenon of false positives counterintuitively outstripping true positives

It seems very counter intuitive to many people that a given diagnostic test with very high accuracy (say 99%) can generate massively more false positives than true positives in some situations, namely ...
20 views

“Unselected sample” vs “random sample”

I've just encountered the term "unselected sample" for the first time, which seems to be fairly commonly used in medicine. Example usages: Climacteric symptoms in an unselected sample of Swedish ...
20 views

When is it appropriate to model data as a Stochastic Process? [closed]

I understand the question may be poorly worded, but please bear with me. I have a background in computer science and mathematics, but never took any upper-level statistics courses. I currently work ...
43 views

Why is the normal distribution called “normal”?

It occurred to me that there is no question on here about the name "normal distribution" yet. There is this question, about whether to call it normal or Gaussian, but it does not address why it is ...
24 views

What does it mean when a distribution is “INDEXED” by something? [duplicate]

I am doing some reading and am seeing phrases such as the following. For context, I am learning about Bayes Inference and prior/posterior distributions so theta is the parameter: In such problems, ...
233 views

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How is a survival model with constant baseline hazard and time varying covariates called?

The data situation: Supose in different forests data have been collected. These data include the temperature at different time points, the hours of rain, the type of forest and whether the event (a ...