This tag indicates questions about definitions of statistical terms. Use a more general tag [terminology] for questions on statistical parlance that are not specifically about definitions.
Questions tagged [definition]
546 questions
28
votes
18 answers
How to describe statistics in one sentence?
When I first started learning statistics, procedures like the t-test, ANOVA, chi-squared and linear regression each appeared to be very different creatures. But now I realise these procedures each do more or less the same thing. And likewise, values…
luciano
- 14,269
9
votes
6 answers
Data vs. Information. What’s the difference between these two terms?
Following are the definitions "representative" of the countless articles I have read about data vs information and yet have nothing to say about them. Can anyone just put some accent upon these two so I would better understand statistical…
Vinay Sharma
- 83
8
votes
1 answer
What does "principled" mean, as in "principled Bayesian analysis"?
I am generally curious what the term "principled" means.
It was used in the title of an unpublished manuscript, "Combining Computer Models in a Principled Bayesian Analysis". In addition, Zhang 2004 says "There are several advantages to a…
Abe
- 3,811
8
votes
4 answers
Ground-truth definition
I have found two meanings of how "ground truth" is being used in machine learning:
Something to be assumed true
Something previously validated as true
Although similar in detail the two can differ. Maybe they are used interchangeably, but a…
brancz
- 133
6
votes
2 answers
Short term for Probability of Type I error
When comparing statistical tests, one often compares
the probability of committing a Type 1 error, and
the probability of not committing a Type 2 error.
While (2) can be concisely termed 'power', is there a concise term for the (1)?
(I don't think…
qoheleth
- 1,472
4
votes
1 answer
Has the parameter $\frac{1}{\sqrt{2(n-1)}}$ a name?
Has the parameter $\displaystyle \frac{1}{\sqrt{2(n-1)}}$ a name? $n=\text{number of observations}$
mle
- 163
2
votes
1 answer
What precisely is "indeterminacy" in neutrosophic statistics?
In Smarandache 2014, Florentin introduces neutrosophic statistics but I don't get a core part of it.
He says:
We emphasize, as in neutrosophic probability,
that indeterminacy is different from randomness. While classical statistics is…
Galen
- 8,442
2
votes
1 answer
What exactly is "fundamental data" and "technical data?"
I'm not sure if this question is appropriate for this community, and if so please feel free to let me know by down voting or closing.
I'm currently working on projects that use machine learning/deep learning applied to financial markets. I hear the…
Sean
- 3,887
1
vote
0 answers
Definition of Statistics by Sheldon M. Ross
Sheldon M. Ross in his book, "Introductory Statistics" states the definition of statistics to be:
"Statistics is the art of learning from data. It is concerned with the collection
of data, their subsequent description, and their analysis, which…
TankFishToad
- 11
1
vote
1 answer
What's the difference between outlier analysis and clustering?
What's the difference between outlier analysis and clustering?
When clustering is done isn't that outliers (if exist) are also found?
Niing
- 125
1
vote
1 answer
What is a random variable in the definition of a linear regression model
In wikipedia's definition of a linear regression model:
$y_i = \beta_1 x_{i1} + \cdots + \beta_p x_{ip} + \varepsilon_i = \mathbf{x}^{\rm T}_i\boldsymbol\beta + \varepsilon_i, \qquad i = 1, \ldots, n, $
Then am I correct in saying the…
simonzack
- 162
0
votes
1 answer
"observational study vs experiment" why is the answer of the question "experiment " and not "observational study"?
this will be on my exam and i'm indignation to have such confusing/vague questions "validating" my results (explaining me why it is not "confusing/vague" and make me look like a fool would be appreciated, that I can forget in one day, not having a…
Dayron
- 3
- 2
0
votes
1 answer
is the definition of "observational study" wrongly elaboreted?/ observational study vs experiment
Google.
"An observational study observes individuals and measures variables of interest but does not attempt to influence the responses"
Question that made me have an argument with my professor and made me create this post:
A quality control…
Dayron
- 3
- 2
0
votes
1 answer
Does combining two standardized test results to a standardized test?
Let's say I have two standardized tests, test A and test B. If I combine the two tests (no items will be discarded, all will be included) to make test C. Can we say test C will be also a standardized test?
sammyyy
- 51
0
votes
1 answer
Can we give posttest without having pretest?
The Merriam-Webster Dictionary defined posttest as a test often used in conjunction with a pretest. The dictionary used "often", so can we give posttest without having a pretest?
https://www.merriam-webster.com/dictionary/posttest
samdoi
- 1