Indicates questions asking about the use and meaning of specific technical words/concepts in statistics.

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10
votes
1answer
300 views

Why is a “negative binomial” random variable called that?

I don't understand why the "negative binomial" random variable has that name. What is negative about it? What is binomial about it? What is negative-binomial about it?
0
votes
0answers
16 views

What is it called when the Test Set and Training set is the same?

Normally when evaluating a model, the training data is split into a test set and a training set. I want to evaluate the best possible performance of the classifier on my task. So I have Trained it ...
1
vote
0answers
52 views

Comprehensive list of misnomers in machine learning

Are there any reference document(s) that give a comprehensive list of misnomers in machine learning? I would like to have a list and simple explanation if needs be that I could go through easily (vs. ...
1
vote
1answer
32 views
+50

Term for sample groups

When describing my sample, I divide it by the binary variable of interest, which is membership in a certain program for my case. Since I'm not an English native-speaker, I have quite a primitive ...
1
vote
2answers
79 views

What is the difference between multimodal and multivariate?

Can somebody explains me the difference between "multimodal" and "multivariate"? For example, I have a dataset which contains different information. All information objects are connected together ...
3
votes
0answers
19 views

Term for a feature that is always 0 in the training data

Is there any term to designate a feature that is always 0 in the training data? (1) calls it unsupported features but I wonder whether there exists any more commonly used term. (1) Sutton, Charles, ...
1
vote
1answer
25 views

Is there any clearer term than multiclass classification?

Multiclass classification is the problem of classifying instances into one of the more than two classes. However, the prefix multi means "more than one" (as in multi-label classification: if one ...
2
votes
1answer
60 views

What is the meaning of the term “stable” in relation to predictions?

In section 2.3 of Elements of Statistical Learning when the text introduces the linear model and k-nearest-neighbour it states: The linear model makes huge assumptions about structure and yields ...
0
votes
2answers
23 views

Are Decision Function and Separating Hyperplane the same?

In many machine learning algorithms such as SVM, GBM, Logistic Regression, etc., are Decision Function and Separating Hyperplane the same?
0
votes
1answer
17 views

Are 'neurons' and 'feature detectors' the same? (in the context of neural networks)

Are 'neurons' and 'feature detectors' the same thing in the context of neural networks? Are neurons feature detectors? Or is there some fundamental difference that I'm missing?
1
vote
3answers
108 views

What is a multivariate logistic regression

There are a lot paper in medical researches using multivariate logistic regression. I am wondering if the multivariate logistic regression is just the mixed effects logistic regression or something ...
2
votes
0answers
25 views

What is regressive about a regression line? [duplicate]

I know what a regression line is. What I'm curious about is the use of the word "regression". What's regressive about a regression line? The etymology of "regression" is early 15c., from ...
4
votes
1answer
102 views

What is the name of this kind of visualization, with arrows showing count of different subsets?

What is the name of this kind of visualization? It uses arrows to show the count of parts of the sample set of an experiment. This is from "Measuring Reproducibility in Computer Systems ...
3
votes
1answer
42 views

What is the origin of the term confusion matrix?

The confusion matrix is a fundamental term in machine learning. However, that name itself is a bit, well, confusing. I tried to trace its origin but I'm not sure I'm correct, and I'd like to hear what ...
0
votes
0answers
14 views

What is the proper name for a Count Bar Chart?

What is the proper name for a Bar Chart plotting counts in ordinate (Y-axis) for a discrete variable plotted in abscissa (X-axis)? Is it the proper definition for a Bar Plot (vs Bar Chart or Bar ...
1
vote
0answers
18 views

What is the proper name for a Quantile Bar Chart?

What is the proper name for a Bar Chart plotting quantiles (like percentiles) in abscissa (X-axis) and a corresponding continuous variable in ordinate (Y-axis)? For example, if the chart is based on ...
0
votes
2answers
109 views

In statistical terminology, what is the opposite of “peak”?

When we see a curve (or a normal distribution), we describe the highest value as "peak". Let's imagine we have a curve with only a minimum value (like an inverted hat), what do we call that minimum ...
2
votes
2answers
52 views

What is calibration?

What does it mean to calibrate survey weights? Also, what are other definitions of calibration in statistics? I have heard it used in several contexts, particularly risk prediction (referring to ...
1
vote
1answer
14 views

Alternate terms, or definition for functional logistic regression

I have recently come upon a paper discussing "functional logistic regression." I could not find literature related to functional logistic regression. Is there a different name for this kind of ...
2
votes
2answers
44 views

What's the name for a distribution of the form $10^D$, where $D$ is a known distribution?

In my particular case, I'm generating uniformly random numbers and using them as the power to a base-10 exponent, e.g. in R: s <- 10^runif(10, 1, 10) Is there ...
3
votes
1answer
73 views

naming convention: what does GLM stand for?

I encountered the term "Global Linear Model" which has the same abbreviation as "Generalized Linear Model". Since I couldn't find useful information on the former, my question is whether the two ...
2
votes
1answer
57 views

What is a “principal component factor analysis”?

I am currently researching silence in the social sciences and am reviewing surveys and statistical methods implemented by researchers to get an idea methods in both survey design and the analysis ...
1
vote
0answers
16 views

Very puzzling - naming the endpoint of survival analysis

A question that should be straightforward for statisticians but is puzzling me to the point I am nervous. I am doing a PhD in Epidemiology and am going to use Cox regression. The predictor is a ...
3
votes
1answer
55 views

Odds or Odds Ratio terminology?

I am having a bit of a tough time with some logistic regression terminology. I have performed a multivariable logistic regression analysis where I have regressed a binary variable (death, where 1 = ...
0
votes
1answer
16 views

In the context of ANNs, is there multi-task learning iff the network has more than 1 output?

This is a terminology question: in the context of artificial neural networks, does multi-task learning occur iff the network has more than 1 output?
2
votes
1answer
25 views

The name of 'Fused' Lasso

As many of you know, the Fused Lasso is one of well known penalized methods, which is introduced by Tibshirani, 2005. However, I don't get to the meaning of how it is called. Could anyone give any ...
4
votes
1answer
85 views

What are “unrotated” and “rotated” principal components, given that PCA always rotates the coordinates axes?

As far as I understand, principal components are obtained by rotating the coordinate axes to align them with the directions of maximum variance. Nevertheless, I keep reading about "unrotated ...
1
vote
2answers
55 views

Observed Vs Unobserved Variables [duplicate]

Can anyone explain the difference between observed variables and unobserved variables (preferably in plain English ) ?
0
votes
2answers
28 views

What is the name of subject for testing which distribution the set of data follows?

What is the name of subject for testing which distribution the set of data follows? I become frustrated since I am a beginner in this area.
2
votes
1answer
49 views

What is the subject of statistics called if the subject is used to studying if the statistic formulated fit the actual data?

What is the subject of statistics called if the subject is used to studying if a statistical model formulated fit the actual data? If there are more than one general subject to study this, name all ...
0
votes
1answer
14 views

Correct terminology: Can I use the term “unknown/s a priori”?

I am trying to solve a regularized least square problem which has two regularization constants: muT, muS. Further, my solution also needs underlying B1-error (MRI terminology) estimation and then ...
5
votes
1answer
137 views

Bar plots with variable bases (intensive and extensive variables at once)

Is there a particular name for bar plots, in which bars are rectangular, with unequal bases? That is: width represents size (e.g. population), height represents intensive variable (e.g. CO$_2$ ...
2
votes
0answers
47 views

Difference between “computational statistics” and “statistical computing”?

From Handbook of computational Statistics by Gentle et al, We use the term “statistical computing” to refer to the computational methods that enable statistical methods. Statistical computing ...
6
votes
2answers
34 views

Prior distribution on/of a parameter

Is it correct to write the prior distribution on $\mu$ ? I think it is correct because it refers to the fact that "we put a distribution on (the state space of) $\mu$". However, I would not say the ...
0
votes
1answer
24 views

Correct notation for unbiased estimate of population variance

I've seen the notation $s^2$, ${s}_{n}^2$, and ${s}_{n-1}^2$ used to represent the unbiased estimate of population variance. Is there a standard notation?
2
votes
1answer
44 views

difference between trial and observation

What's the difference between a trial and an observation? My sense is that an observation is a measurement of a variable for a single trial. Is this correct?
1
vote
0answers
46 views

4-point Likert scale

I have compiled a questionnaire using a glossary of terms. I have 4 options that people can select. The terms are; I don't understand the word and I can't define it / I understand it but I never use ...
5
votes
1answer
39 views

What is the term for the product of a probability and its complement?

The odds of an event is the quotient of the probability of the event $A$ and its complement; i.e. $p/(1-p)$, if $p = P(A)$. Is there a name for this term: $p(1-p)$? (Also sometimes appearing as ...
1
vote
1answer
12 views

Name of error measure based on top |positives| results

I am evaluating a retrieval algorithm. I remember that I read about an error measure which basically entails the quotient of the number of true positives in the top $N_p$ results, where $N_p$ is the ...
1
vote
0answers
36 views

Is there a name for the $n=50$ quantiles?

For $n = 5, 10, 20, 100$ we have quintiles, deciles, vigintiles, and percentiles. Is there a name for $n = 50$? A candidate would be quinquagintiles, but I can't find that having being used.
1
vote
1answer
58 views

Is structural equation modeling (SEM) just another name of confirmatory factor analysis (CFA)?

I am reading some material about structural equation modeling. I found it to be extremely similar to confirmatory factor analysis - modeling a construct as the linear combination of several other ...
22
votes
3answers
2k views

Why are there two spellings of “heteroskedastic” or “heteroscedastic”?

I frequently see both the spellings "heteroskedastic" and "heteroscedastic", and similarly for "homoscedastic" and "homoskedastic". There seems to be no difference in meaning between the "c" and the ...
1
vote
1answer
44 views

Multifactorial analysis of variance with repeated measurements-literature

What is the difference between multivariate and multifactor ANOVA? Does anybody have any pointers to downloadable literature about multifactorial analysis of variance with repeated measurements?
20
votes
2answers
747 views

Does this discrete distribution have a name?

Does this discrete distribution have a name? For $i \in 1...N$ $f(i) = \frac{1}{N} \sum_{j = i}^N \frac{1}{j}$ I came across this distribution from the following: I have a list of $N$ items ranked ...
0
votes
0answers
13 views

Terminology for comparing anwers to a set of reference questions

I´m conducting a questionnaire in order to examine the behavior of drivers of electric vehicles when providing information, such as parking time, to a charging station. For several reasons it is ...
1
vote
0answers
24 views

How to call extreme samples in a Monte Carlo simulation for hypothesis testing?

For many hypothesis tests, Monte Carlo methods are used to estimate the empirical $p$-value which is defined as $$p=\#{(T_{sample} > T_{observed})}/N.$$ Is there a name for the samples with ...
3
votes
1answer
79 views

What is the covariance called when it is not divided by N?

I noticed that in signal processing they have this term called cross-covariance. The cross covariance function produces covariances of two functions with different lags. At the center of the vector ...
0
votes
0answers
16 views

The differences between criterion validity and operational validity

In some psychological articles, I have seen the term "operational validity". It is often used instead of "criterion validity". What are the differences between these two concepts?
0
votes
1answer
66 views

What is the difference between simple histogram and histogram LBP?

What is the difference between a simple histogram and a histogram LBP (local binary pattern)? Can someone provide the intuition behind histogram LBP?
0
votes
0answers
15 views

what is the drawback of DLBP(Dominant local binary pattern)?

Although the DLBP features encapsulate more textural information than the conventional LBP features, they lack the consideration of distant pixel interactions. The reason is that the binary patterns ...