it.wikipedia.org website review
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it.wikipedia.org is 56% geoptimaliseerd!
SEO Keyword summary for it.wikipedia.org/wiki/varianza
Keywords are extracted from the main content of your website and are the primary indicator of the words this page could rank for. By frequenty count we expect your focus keyword to be displaystyle
Focus keyword
Short and long tail
Short Tail Keywords displaystyle mathbb varianza |
long Tail Keywords (2 words) xdisplaystyle x valore atteso variabile aleatoria della varianza varianza della |
long Tail Keywords (3 words) di due variabili una variabile aleatoria di una variabile della somma di due variabili indipendenti somma di due varianza di una |
it.wikipedia.org On-Page SEO Scan
Descriptive Elements
The <head> element of a it.wikipedia.org/wiki/varianza page is used to inform the browser and visitors of the page about the general meta information. The head section of the page is where we place the page title, the definition of the HTML version used, the language of in which the page is written. In the head section we can also include JavaScript and CSS (markup) files for the page.
Page title
Title length
varianza wikipedia
Meta description
Meta description legth
Meta description SEO
No meta relevance in the description detected !
Content SEO
Number of Words
Spam detected?
Headings
Heading distribution
Heading normalisation
Heading SEO impact
Emphasis (bold and italic)
Emphasis SEO impact
Images
Number of images
Images dimensions
Image alt descriptions
Images SEO impact
niente fonti esempio campioni due popolazioni con stessa media diversa varianza displaystyle sigma mathrm var mathbb xmathbb big xbig pbig geqslant lambda leqslant frac xsqrt pxx min max axb axbmathbb axbaxbamathbb xbaxmathbb xymathbb xxmathbb textstyle bar xfrac ldots xnn nsigma xsum xin axpxx sum axmathbb xint axfxdx int fxdx cdot pqpqpq ppq iximu ixin nsum kxjmu njnfj leftfrac nxi rightmu kxj njmu fjmu nxibar nquad quad beginalignedoperatorname operatorname nxioverline right ptoperatorname xioverline xoverline leftsum overline nxinoverline rightright noverline ptfrac noperatorname leftnoperatorname leftsigma xoperatorname xmu xright ptsigma endaligned nmu chi collabora wikizionario wikimedia commons modifica wikidata foundation powered mediawiki
Mobile SEO it.wikipedia.org/wiki/varianza
Mobile rendering
Mobile optimizations
Responsive design detected (mobile css)
No flash detected !
Mobile improvement
Marketing / lead generation for it.wikipedia.org/wiki/varianza
Social Media
Facebook shares | Facebook likes | ||
Facebook comments | Tweets | ||
Google +1 |
Conversion form
Search form
Analytics
Online presence
SERP Preview
SERP Title
SERP Link
SERP Description
Domain Level SEO
Domain name
16 characters long
Domain name SEO Impact
Path name
varianza found in path !
Structured data
Publisher Markup
Other Structured data
Website configuration
Correct processing of non-existing pages?
Favicon icon found?
Robots.txt found?
Sitemap found?
Navigation and internal links
Navigation
Url seperator
Human readable urls
Number of links
Link SEO Impact
statistiche
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it.m.wikipedia.org versione mobile
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link permanente
cronologia
informazioni pagina
versione stampabile
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wiki grado di libert chimica
statistica
teoria della probabilit
carattere
variabile aleatoria
funzione
media aritmetica
valore atteso
dispersione
momento centrato
ronald fisher
karl pearson
disuguaglianza di ebyv
quasi certamente
formula computazionale per la varianza
linearit
traslazione
riscalamento
variabili indipendenti
covarianza
discreta
funzione di probabilit
continua
densit di probabilit
bernoulli
indice di variabilit
distribuzione di frequenze
carattere
popolazione
modalit
frequenza relativa
radice quadrata
scarto quadratico medio
stimatori
integrale
bias
teorema del limite centrale
variabili aleatorie normali
distribuzione 2displaystyle chi 2
legge della varianza totale
deviazione standard
variabili dipendenti e indipendenti
algoritmi per il calcolo della varianza
enciclopedia britannica
mathworld
statistica descrittiva
armonica
mediana
moda
intervallo di variazione
scarto medio assoluto
simmetria
differenza media
assoluta
logaritmica
curtosi
inferenza statistica
test di verifica dipotesi
significativit
ipotesi nulla
errore del i
del ii tipo
test q
test u
test t
test z
massima verosimiglianza
standardizzazione
valore p
analisi della varianza
analisi di sopravvivenza
tasso di guasto
stimatore di kaplanmeier
test dei ranghi logaritmici
analisi della regressione
regressione lineare
regressione nonlineare
variabili strumentali
metodo generalizzato dei momenti
regressione logistica
modello probit
modello logit
statistica economica
eurostat
royal statistical society
us census bureau
siti web
our world in data
statista
bloomberg terminal
google public data explorer
world inequality database
tradingeconomics
software
econometrici
gretl
eviews
misurazione
misura di probabilit
propriet fisica
grandezza fisica
parametro
popolazione statistica
valore vero
campione
misurando
precisione
accuratezza
ripetibilit
riproducibilit
tolleranza
sensibilit
risoluzione
risoluzione laterale
omoschedasticit
eteroschedasticit
ipotesi statistica
approssimazione
cifra significativa
variabile casuale
normalizzazione
incertezza di misura
errore di misurazione
errore sistematico
errore statistico
errore di sensibilit
falso positivo e falso negativo
errore assoluto
errore relativo
propagazione degli errori
bianco analitico
taratura
calibrazione
rapporto segnalerumore
confronto interlaboratorio
qualit dei dati
outlier
spazio campionario
campionamento statistico
piano di campionamento
campionamento ragionato
campionamento per quote
campionamento casuale
campionamento sistematico
campionamento stratificato
campionamento a grappoli
campionamento multistadio
campionamento probabilistico
devianza
intervallo dinamico
coefficiente di variazione
test parametrico
test non parametrico
intervallo di confidenza
thesaurus bncf
leggi
pagina principale
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Links to external pages
Outloing links
commons.wikimedia.org
it.wiktionary.org
it.wiktionary.org
commons.wikimedia.org
commons.wikimedia.org
commons.wikimedia.org
www.britannica.com
www.wikidata.org
www.wikidata.org
thes.bncf.firenze.sbn.it
www.d-nb.info
id.ndl.go.jp
www.wikidata.org
commons.wikimedia.org
ar.wikipedia.org
az.wikipedia.org
be.wikipedia.org
bg.wikipedia.org
bn.wikipedia.org
ckb.wikipedia.org
cs.wikipedia.org
cy.wikipedia.org
da.wikipedia.org
de.wikipedia.org
el.wikipedia.org
eo.wikipedia.org
es.wikipedia.org
et.wikipedia.org
eu.wikipedia.org
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he.wikipedia.org
hi.wikipedia.org
hu.wikipedia.org
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ka.wikipedia.org
lt.wikipedia.org
mk.wikipedia.org
ms.wikipedia.org
nl.wikipedia.org
nn.wikipedia.org
no.wikipedia.org
pl.wikipedia.org
pt.wikipedia.org
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ru.wikipedia.org
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ta.wikipedia.org
tr.wikipedia.org
uk.wikipedia.org
ur.wikipedia.org
vi.wikipedia.org
wuu.wikipedia.org
zh.wikipedia.org
zh-min-nan.wikipedia.org
zh-yue.wikipedia.org
www.wikidata.org
www.creativecommons.org
foundation.wikimedia.org
foundation.wikimedia.org
SEO Advice for it.wikipedia.org
In this section we provide pointers on how you can to optimize your web page so it can be found more easily by search engines and how to make it rank higher by optimizing the content of the page itself. For each of the individual criteria the maximum score is 100%. A score below 70% is considered to be indication that the page is not complying with general SEO standards and should be evaluated and/or fixed. Not every factor is weighted the same and some are not as important as others. Relatively unimportant factors like meta keywords are not included in the overall score.
Item | Factor | Pointers | |
---|---|---|---|
PageTitle | 100% | Far too many sites lack a page title. A page title is the first thing that shows in the search results so always use the title element. | |
Title relevance | 65% | A title should reflect the contents of a site. This site has a 50 % match | |
Title Length | 30% | Limit your title to anywhere between 40 and 70 characters. Your title was 21 characters long | |
Meta Description | 0% | A meta description is the second element that shows in the search results so always use the meta description. | |
Meta description length | 0% | The meta description should be between 145 and 160 characters. This meta description is 1 characters long. | |
Meta description relevance | 0% | Meta Description should reflect the contents of a site. This site has a 0 % match | |
Number of internal links | 30% | Linking to internal pages makes pages easier to find for search engines. Try to keep the number of links on your page roughly below 100. There are 251 internal links on this page. | |
Folder structure | 100% | We found a folder structure in the links on your page. A good folder structure makes a site easier to navigate. We found 3 level 1 folders and 6 folders above or in the first level of navigation. | |
Headings | 64% | Headers should reflect the contents of a site. This site has a 28 % match | |
Links | 14% | Link anchors should to some degree reflect the contents of a site. This site has a 7 % match | |
Image alt tags | 42% | Image alt tags should to some degree reflect the contents of a site. This site has a 15 % match | |
Bold and italic | 51% | Bold and italic tags should reflect the contents of a site to some degree. This site has a 17 % match | |
Html ratio | 30% | Try to keep the html / text ratio as low as possible. More html means longer loading times. Layout should be handled in a serpate css file | |
Image descriptions | 96% | 96.396396396396 % of all images have been described via the "alt" attribute. Describing images with relevant text may lead to better results in the search engines. | |
Page errors | 100% | Pages with no errors display significantly faster on most browsers. We detected 0 errors and warnings | |
WordCount | 20% | An ideal page contains between 400 and 600 words.This page contains 2995 words | |
Server response time | 30% | A slow server slows down a website. This server responds 0.76% slower the average | |
Gzip compression | 30% | This site does not use Gzip compression. Pages may not display as fast as they could | |
Keywords in Domainname | 30% | There are no important keywords in your domain name | |
Keywords in domain path | 100% | There are important keywords in the domain path | |
Structured Data | 100% | Structured data makes it easier for search engines to index your website | |
Inline css | 0% | Do not use inline css declarations. Inline css will slow down the rendering of the website. We detected 235 inline style declarations ( <a style="color:green">) with a size of 8161 bytes | |
Excessive use of the same words | 100% | There is no indication that there are one or more keywords that are used excessively. | |
Frames or iframes | 100% | Perfect, detected not (i)frames on your webpagina | |
Flash | 100% | Perfect, we detected no flash objects on your page | |
Css | 30% | We detected too much (2) CSS files on your page. Css files block the loading of a webpage. | |
Javascript | 100% | Perfect, we did not detect too many blocking JavaScript files | |
Mobile Website | 100% | Perfect, we found a responsive design for mobile users | |
Most important heading | 100% | Perfect, we detected a correct use of the most important (h1) heading! | |
Normalized headings | 100% | Perfect, we found a correct use of normalized headings ! |
How would you like to have SEO advice for all your pages ?? Start your SEO Dashboard and optimize your website!
it.wikipedia.org images and descriptions
89 images found at it.wikipedia.org Images can improve the user experience for a website by making a pag visually appealing Images can also add extra keyword relevance to a webpage by using alt tags. Images can also slow down a website. If the width and height for a picture is not specified for a browser know in advance how large the image is. A browser must first load the picture and see before it knows how much space should be on the page. Upon reservation In the meantime, the browser can do little but wait. When the height and width for the plate are given in the HTML code, a browser just continues to build for a page while the images load in the background.
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https://upload.wikimedia.org/wikipedia/commons/thumb/6/64/question_book-4.svg/45px-question_book-4.svg.png height: 35 width: 45 description: niente fonti! |
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https://upload.wikimedia.org/wikipedia/commons/thumb/f/f9/comparison_standard_deviations.svg/220px-comparison_standard_deviations.svg.png height: 163 width: 220 description: esempio di campioni da due popolazioni con la stessa media ma diversa varianza. |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/7bcb3add443612dedd9d94f2ce3121f922d60e66 height: height attribute not set width: width attribute not set description: {\displaystyle \sigma _{x}^{2}=\mathbb {e} [(x-\mathbb {e} [x])^{2}]=\mathbb {e} [(x-p)^{2}]=p^{2}p(x=0)+q^{2}p(x=1)=pq(p+q)=pq,} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/a3c7651fb25865388a4d5158adcd15cb034616ef height: height attribute not set width: width attribute not set description: {\displaystyle \sigma _{x}^{2}=\mathbb {e} [x^{2}]-\mathbb {e} [x]^{2}=p(x=1)-p^{2}=p(1-p)=pq.} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/c6046e4d658c9f5a296c51500882944dc6a51e80 height: height attribute not set width: width attribute not set description: {\displaystyle \sigma _{x}^{2}={\frac {\sum _{i}(x_{i}-\mu _{x})^{2}}{n}},} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/7738ddf46970849522febfe899b76b2c9ecae987 height: height attribute not set width: width attribute not set description: {\displaystyle \textstyle \mu _{x}={\frac {\sum _{i}x_{i}}{n}}} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/3f5c1092f2df70fd2fc887aa7f132a044f5bcd09 height: height attribute not set width: width attribute not set description: {\displaystyle \sigma _{x}^{2}={\frac {1}{n}}\sum _{j=1}^{k}(x_{j}-\mu _{x})^{2}n_{j}} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/2b76fce82a62ed5461908f0dc8f037de4e3686b0 height: height attribute not set width: width attribute not set description: {\displaystyle k} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/5db47cb3d2f9496205a17a6856c91c1d3d363ccd height: height attribute not set width: width attribute not set description: {\displaystyle x_{j}} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/d2c97b31dca4eeefe57123a12e69e6ea73f3dcd2 height: height attribute not set width: width attribute not set description: {\displaystyle n_{j}} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/2f461e54f5c093e92a55547b9764291390f0b5d0 height: height attribute not set width: width attribute not set description: {\displaystyle j} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/2f674fc3403c5e4f6edbb9a4d52561f4864c55a6 height: height attribute not set width: width attribute not set description: {\displaystyle n_{j}/n=f_{j}} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/90cdcd9d462f7043c0c97988e74651a9ffc768a4 height: height attribute not set width: width attribute not set description: {\displaystyle \sigma _{x}^{2}=\sum _{j=1}^{k}(x_{j}-\mu _{x})^{2}f_{j}} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/acc195ab3f9d65994b47774eb013601d09217aee height: height attribute not set width: width attribute not set description: {\displaystyle f_{j}} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/305e82a2ea469f54d710e308af0421387d38ac81 height: height attribute not set width: width attribute not set description: {\displaystyle \sigma _{x}^{2}=\left({\frac {1}{n}}\sum _{i=1}^{n}x_{i}^{2}\right)-\mu _{x}^{2}.} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/7b8609114c15b396703139d28ee388a9e9ad0ec8 height: height attribute not set width: width attribute not set description: {\displaystyle \sigma _{x}^{2}={\frac {1}{n}}\sum _{j=1}^{k}x_{j}^{2}n_{j}-\mu _{x}^{2}} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/b4aa55fe85f1d06f58ffa97144b4f7576656fbdd height: height attribute not set width: width attribute not set description: {\displaystyle \sigma _{x}^{2}=\sum _{j=1}^{k}x_{j}^{2}f_{j}-\mu _{x}^{2}.} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/17cc873edd3b96c199087b2d799d0c909a197465 height: height attribute not set width: width attribute not set description: {\displaystyle s_{n}^{2}={\frac {\sum _{i=1}^{n}(x_{i}-{\bar {x}})^{2}}{n}}\quad } |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/6bdfd531eaa4f2d74cac408b8afa8e91ed55b16a height: height attribute not set width: width attribute not set description: {\displaystyle \quad s_{n-1}^{2}={\frac {\sum _{i=1}^{n}(x_{i}-{\bar {x}})^{2}}{n-1}},} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/d82fec5320ccee008fd1a7400edcd3451e37431f height: height attribute not set width: width attribute not set description: {\displaystyle \textstyle {\bar {x}}={\frac {x_{1}+\ldots +x_{n}}{n}}} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/93f3e19e0f1ca3ca6e44498a25c6e32c6a321253 height: height attribute not set width: width attribute not set description: {\displaystyle s_{n-1}^{2}} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/8071f6c1b08b0b2e2cf41ae0bfdcf6d77c6b6505 height: height attribute not set width: width attribute not set description: {\displaystyle \mathbb {e} [s_{n-1}^{2}]=\sigma ^{2}(x).} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/ddf65d856db1e0df13b767b9f58bf84e14b7d7b4 height: height attribute not set width: width attribute not set description: {\displaystyle {\begin{aligned}\operatorname {\mathbb {e} } [s_{n-1}^{2}]&=\operatorname {\mathbb {e} } \left[{\frac {1}{n-1}}\sum _{i=1}^{n}(x_{i}~-~{\overline {x}})^{2}\right]\\[8pt]&=\operatorname {\mathbb {e} } \left[{\frac {1}{n-1}}\sum _{i=1}^{n}(x_{i}^{2}~-~2x_{i}{\overline {x}}+{\overline {x}}^{2})\right]\\[8pt]&=\operatorname {\mathbb {e} } \left[{\frac {1}{n-1}}\left(\sum _{i=1}^{n}x_{i}^{2}~-~2{\overline {x}}\sum _{i=1}^{n}x_{i}+n{\overline {x}}^{2}\right)\right]\\[8pt]&=\operatorname {\mathbb {e} } \left[{\frac {1}{n-1}}\left(\sum _{i=1}^{n}x_{i}^{2}~-~2n{\overline {x}}^{2}+n{\overline {x}}^{2}\right)\right]\\[8pt]&=\operatorname {\mathbb {e} } \left[{\frac {1}{n-1}}\left(\sum _{i=1}^{n}x_{i}^{2}~-~n{\overline {x}}^{2}\right)\right]\\[8pt]&=\operatorname {\mathbb {e} } \left[{\frac {1}{n-1}}\sum _{i=1}^{n}x_{i}^{2}~-~{\frac {n}{n-1}}{\overline {x}}^{2}\right]\\[8pt]&={\frac {1}{n-1}}\left(\sum \operatorname {\mathbb {e} } [x_{i}^{2}]~-~n\operatorname {\mathbb {e} } [{\overline {x}}^{2}]\right)\\[8pt]&={\frac {1}{n-1}}\left(n\operatorname {\mathbb {e} } [x^{2}]~-~n\operatorname {\mathbb {e} } [{\overline {x}}^{2}]\right)\\[8pt]&={\frac {n}{n-1}}\left(\sigma ^{2}(x)+\operatorname {\mathbb {e} } [x]^{2}~-~\sigma ^{2}({\overline {x}})-\operatorname {\mathbb {e} } [{\overline {x}}]^{2}\right)\\[8pt]&={\frac {n}{n-1}}\left(\sigma ^{2}(x)+\mu ^{2}~-~{\frac {1}{n}}\sigma ^{2}(x)-\mu ^{2}\right)\\[8pt]&={\frac {n}{n-1}}\left({\frac {n-1}{n}}~\sigma ^{2}(x)\right)\\[8pt]&=\sigma ^{2}.\end{aligned}}} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/f722b47dfeb1c421342ade44f0e38fa31e2a60fb height: height attribute not set width: width attribute not set description: {\displaystyle s_{n}^{2}} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/2df55cf52bfe0343d626c594291d79e83ec6ca9d height: height attribute not set width: width attribute not set description: {\displaystyle \mathbb {e} [s_{n}^{2}]=\textstyle {\frac {n-1}{n}}\sigma ^{2}(x)} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/fbd0b0f32b28f51962943ee9ede4fb34198a2521 height: height attribute not set width: width attribute not set description: {\displaystyle n-1} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/af4a0955af42beb5f85aa05fb8c07abedc13990d height: height attribute not set width: width attribute not set description: {\displaystyle x_{i}} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/f36517cd8dd095e0f5e59d29113b5e056f675fc7 height: height attribute not set width: width attribute not set description: {\displaystyle n(\mu ,\sigma )} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/8c0cc9237ec72a1da6d18bc8e7fb24cdda43a49a height: height attribute not set width: width attribute not set description: {\displaystyle \chi ^{2}} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/cdb41e9a10a8fd7179b9170149a8d70949ba5d03 height: height attribute not set width: width attribute not set description: {\displaystyle n=5} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/9eb4289ae77ac0797bd9c12cd5293590cc4368e7 height: height attribute not set width: width attribute not set description: {\displaystyle \{-4,-1,1,2,7\}} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/7feedc6d57c855885b6130ee8a72f26d5f631f97 height: height attribute not set width: width attribute not set description: {\displaystyle {\bar {x}}={\frac {-4-1+1+2+7}{5}}=1} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/eb4522c3bf7056f4e25a0014d9618785ca653858 height: height attribute not set width: width attribute not set description: {\displaystyle s_{n}^{2}={\frac {(-4-1)^{2}+(-1-1)^{2}+(1-1)^{2}+(2-1)^{2}+(7-1)^{2}}{5}}={\frac {25+4+0+1+36}{5}}={\frac {66}{5}}=13,2} |
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https://wikimedia.org/api/rest_v1/media/math/render/svg/24edf94f46eb7e57819540b34be3bcbf50b80b74 height: height attribute not set width: width attribute not set description: {\displaystyle s_{n-1}^{2}={\frac {66}{5-1}}=16,5.} |
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