Costantino Ricciuti. Search this site. Home page. Research activity. Introduction to biomedical statistics. Tutorato Ingegneria Gestionale Prof. Docente: Costantino Ricciuti. Si raccomanda, quindi, di controllare frequentemente questa pagina web per eventuali comunicazioni a riguardo. Il giorno e l'ora devono essere concordati via mail, scrivendomi all'indirizzo costantino. Definizione di spazio campionario. Concetto di evento come sottinsieme dello spazio campionario. Definizione di sigma-algebra.

Conseguenze degli assiomi con dimostrazione. Esempi vari. Principio fondamentale del calcolo combinatorio. Elementi di calcolo combinatorio: disposizioni, disposizioni semplici, permutazioni, combinazioni.

Legge ipergeometrica. Regola della catena o del prodotto. Esempi ed esercizi. Legge delle alternative: enunciato, dimostrazione, esempi. Variabili discrete. Valore atteso di variabile discreta. Varianza di una variabile discreta. Distribuzione uniforme discreta. Distribuzione di Poisson con qualche cenno al modello del conteggio di eventi rari.

Distribuzione binomiale. Valore atteso e varianza per le variabili continue.

Statistica con R

Distribuzione gaussiana generale, ottenuta come trasformazione di una gaussiana standard. Diseguaglianze di Markov e Chebychev con dimostrazione. Calcolo del valore atteso in due modi equivalenti con dimostrazione dell'equivalenza. Esercizi sulle variabili doppie discrete. Indipendenza tra variabili aleatorie; criteri di indipendenza per variabili discrete e continue. Esercizi vari sulle variabili doppie continue.

Valore atteso della somma di due generiche variabili aleatorie con dimostrazione.La prova orale si svolgera mediante videoconferenza WebEx si vea il link riportato di seguito. Usare questo link per attivare la videoconferenza per la prova orale di statistica 2 se il proprio cognome inizia con le lettere da A a L inclusa.

In particolare la funzione di verosmiglianza, l'efficienza di uno stimatore e i metodi di stima dei momenti e della massima verosimiglianza. In questi lucidi sono riportate le indicazioni su come accedere al materiale disponibile sulla piattaforma digitale associata al libro di testo: Cicchitelli, D'Urso, Minozzo, - Statistica: principi e metodi.

I lucidi sono stati gentilmente messi a disposizione dalla Pearson Italia S. In questa sezione sono contenuti gli appunti di lezione e i lucidi riassuntivi degli argomenti in esse trattati. I lucidi riportano sintetici riepiloghi degli argomenti visti a lezione.

Gli appunti di lezione sono la trascrizione su file pdf delle lezioni tenute in aula. Questi documenti non devono essere quindi intesi come materiale di studioma solo come un'indicazione dettagliata degli argomenti svolti. Per un trattamento esaustivo degli argomenti si faccia riferimento al libro di testo e al materiale integrativo sulle parti di teoria riportato nella presente pagina. Argomenti : Correttezza non distorsionedistribuzione della varianza campionaria nel caso di popolazioni normali, disuguaglianza di Jensen, Efficenza relativa.

Argomenti : Stima intervallare intervalli di confidenza. Aspetti generali sugli intervalli di confidenza, intervalli di confidenza per il valore atteso e la varianza di una popolazione normale, intervalli di confidenza approssimati per popolazioni qualsiasi, intervalli di confidenza per la differenza del valore atteso di due popolazioni normali e approssimati per popolazioni qualsiasi.

due esercizi di statistica

Argomenti : aspetti generali dell'inferenza per popolazioni finite. Il campionamento casuale semplice. I campionamento stratificato. Si ringrazia il Prof. Solari e il Dottor Corradin per aver fornito larga parte del materiale contenuto in questa sezione. Statistica II - Simulazione primo parziale Test. Le soluzioni alle domande a risposta multipla sono riportate nella seconda pagina del file pdf. Il primo esercizio riguarda argomenti della prova totale. In questa sezione sono riportati i temi di esame e i relativi svolgimenti assegnati in alcuni appelli recenti.

Raccolta di esercizi svolti per argomento. Octavian Razvan Corlade. Vai al contenuto principale. Pannello laterale. Indice degli argomenti Introduzione. Avvisi Forum. In questa bacheca viene reso disponibile il materiale per esercitazioni e tutorati. Istruzioni per la compilazione del questionario sulle opinioni degli studenti sul corso File.

Programma dettagliato del corso File. Registro delle lezioni. Le prove orali si terranno il giorno 21 luglio a partire dalle ore Istruzioni dettagliate per lo svolgimento del test e della prova scritta File. Procedura da seguire per collegarsi in via telematica alla prova d'esame File. Materiale Didattico Integrativo. Lucidi sull'uso della piattaforma digitale associata al libro di testo File 4. Esercizi assegnati durante le settimane di lezione Tool esterno.

Tavole statistiche.Di seguito il codice per rappresentare graficamente, usando ggplot2 tale versione del boxplot; si aggiunge al grafico anche la rappresentazione dei singoli valori come punti, spostati grazie alla funzione jitter. Etichette: ggplot2Grafici. Ma vediamo subito un esempio, per comprendere il campo di applicazione di questo test.

I 12 soggetti rispondono con delle crocette per marcare la loro preferenza di marca. Le possibili risposte variano da "nessuna crocetta" a "tre crocette" sulle 3 marche.

due esercizi di statistica

Per fare questo, possiamo eseguire il test di McNemar, a coppie. Il confronto che viene fatto si basa sulla mediana della popolazione. La statistica test Fr viene calcolata con le seguenti due formule. La prima si applica se non ci sono ripetizioni, mentre la seconda nel caso in cui ci sono ripetizioni nella assegnazione del rango.

La statistica test segue una distribuzione di Friedman; per campioni molto grandi molti gruppi, o molti elementi per gruppo allora si usa la distribuzione Chi-quadro, per la scelta del valore critico. Consideriamo i seguenti esempi. Il gestore di un locale ha 7 dipedenti, i quali sono sempre ritardatari. Per cercare di risolvere tale problema, adotta due strategie. Durante il primo mese di strategia decide di premiare i dipendenti che non fanno ritardo; il mese successivo invece punisce i dipedenti che ritardano.

Raccoglie gli orari di arrivo come differenza tra l'ora d'inizio del lavoro, e l'ora di arrivone calcola le medie, e ottiene una tabella come la seguente: Il gestore vuole sapere se uno dei due metodi applicati apporti un cambiamento nei ritardi dei suoi dipedenti.

Esercizi di statistica

Le ipotesi del problema sono quindi: Per prima cosa, assegnamo il rango a ciascuna cella, disponendo in ordine crescente le celle in base alla riga. Un allenatore di pallavolo di 12 ragazzi vuole sperimentare due nuovi tipi di allenamento. Per valutarne l'efficacia, usa come parametro il numero di piegamenti che ciascun ragazzo riesce a fare in un minuto.

Raccoglie i dati in una tabella: la prima colonna contiene il numero medio di piegamenti che i ragazzi riescono a fare di base prima degli allenamentimentre le altre due colonne fanno riferimento ai risultati ottenuti dopo i due nuovi tipi di allenamento, durante il primo e il secondo mese. A questi valori vengono assegnati i seguenti ranghi.

Indici di posizione: quartili, percentili e decili

Con questo test confrontiamo i 3 gruppi, a coppie.In this model, popular sites are hotter than unpopular sites, and this is a reflection of the real webHot sites are well known and well linked to and more likely to rank for any term if a page is properly optimised on-page and via the internal navigation structure of the website. Hello, Google Supplemental Index. Or whatever Google calls it in 2017. Google hates paid links because it is an obvious way to generate heat signature, and ranking ability, a site might not deserve.

One thing is for sure, though. If Google were confident they could via algorithmic calculation clearly identify paid links, the whole internet marketing industry would not have been talking about the war on paid links. The hotter a site, or rather page, the better the link for your site. If a keyword is in the anchor text of the link, even better, but only if it is an EDITORIAL LINK, in 2017.

The problem is, the easiest links to find out there are on pages with very cold, or at least very diluted heat signatures. I prefer focusing on improving those signals above, rather than just manipulating link popularity. Google calls that spam, and will punish you for it if it detects an intent to deceive its algorithms. Not that that stops a good spammer of course. If you have, you need to concentrate on dissociating yourself first from unnatural links).

Two of the 3 major (UK) search engines (recently) encouraged you to ask websites for links to improve the ranking of your site, and the biggest, Google, tells you not to do it at all.

Actionable Advice From Yahoo and Bing: Get links from related sites. Ask for links to increase the number of links to your site. That said, techniques used are often quite revealing of intent.

Back To Table Of ContentsGetting other sites to link to yours is easy when you have content worth linking to. It is that simple in some cases. The more content you add to your site, the more likely people will link to it, today or in the future. So the first thing you should be doing is adding high-quality content to your site. I think How-To articles, or articles that discuss a common problem often discussed in forums, etc.

See that little FAQ on your site. That page needs to be improved. Each FAQ could be an individual page with a good page title, which meets its purpose, in a well-structured site. And you need to add that content to your website.

Having content on your site makes it so much easier to pick up links. Most folks are not interested. Tell the world about your site. Googlecreate unique, relevant content that can naturally gain popularity in the Internet community.

Creating good content pays off: Links are usually editorial votes given by choice, and the more useful content you have, the greater the chances someone else will find that content valuable to their readers and link to it. GoogleGoogle does not want you asking specifically for links or building links you make yourself because this is a clear attempt to manipulate rankings.

Links are what the web is about though, and it is why Google is the number 1 search engine. Links were about before Google, though. I never specify any attribute of the link either e. If you want people to link to you in a particular way, make sure the title of the page you want links to, has the keywords you want to rank for featured, and a lot of folks will use those words to link to you.

I sometimes change the title of pages for this exact reason.ET on Friday, December 8, 2017. The Celtics will be looking for similar success after defeating the Dallas Mavericks in their last outing, 97-90.

Al Horford had a solid performance for Boston, finishing with 17 points, eight rebounds and eight assists. The Spurs forced 18 turnovers and had an offensive rebounding percentage of 30. With 16 points and seven rebounds, Rudy Gay had a solid performance for San Antonio. San Antonio ranks second in defensive efficiency (101. Boston heads into the contest with records of 22-4 straight up (SU) and 19-6-1 against the spread (ATS).

Vegas has been spot on when setting the total of Celtics games, with an even split between overs and unders. Meanwhile, San Antonio is 17-8 SU and 13-10-2 ATS. Horford has averaged 17. Horford recorded 14 points, 13 rebounds and five assists in the first matchup, in which the Celtics beat the Spurs 108-94, covering as 3.

The game finished with a total of 202 points, which was 8. The Celtics had a much better offensive rebounding percentage (34. Boston ranks ninth in three pointers attempted per game (30. The Spurs are second in the NBA with 9. During their last five games, the Spurs have scored an average of 99. Tags Boston celtics san antonio spursThe Creighton Bluejays (6-2) matchup against the Nebraska Cornhuskers (7-3) at CenturyLink Center Omaha on Saturday night.

At home, San Antonio is 9-4-1 ATS with 8 overs and 6 unders. When holding opponents under 100 points, San Antonio is 11-4 and Boston is 16-0. The Spurs are 12-0 when they reach 100 points, while the Celtics are 16-2. The Spurs rank second in blocks per game (6. Boston ranks first in steals allowed per game (6. The Spurs rank 17th in points off turnovers per game (16. San Antonio ranks 21st in points in the paint per game (41. The Spurs rank fourth in rebounds allowed per game (41.

Boston ranks fifth in assists allowed per game (20. Bettings Trends: In their last five games, Boston is 2-3 ATS with 3 overs and 2 unders. San Antonio is 3-1-1 ATS with 3 unders and 2 overs over their last five games.

So he is the outstanding First and Anytime Goalscorer pick. For the more cautious bettor, Both Teams to Score and Over 2. Not huge prices, but ideal for topping up accumulators. Alan Irvine has made it clear in the build up he wants to end his stint on an upbeat note, after the manner Norwich were pegged back at Leeds United. The big man bows out after 243 games, two promotions, an England cap and two relegations.

Irvine confirmed on Thursday that Ruddy will get his chance to play. What about a sentimental clean sheet.

Steven Whittaker is another of the seven senior boys set to be released when their current contracts expire. Whittaker, like Ruddy, continued to train after the announcement and the Scot may be rewarded with a final day cameo. Mitchell Dijks may be making his last Norwich appearance, if the Canaries are unable to strike a deal with Ajax and the Dutch full-back for next season.

Given his power and threat from set pieces that might be worth consideration. Cameron Jerome is on 16 goals for the season.Everything was incredible, and we can't wait to return. It was a thoroughly-planned trip from A to Z with many options to select from and add to the trip depending on the location.

The booklets given were most helpful and actually more efficient than Google, or just easier to navigate. Our hotels were perfect. We enjoyed wonderful dinners, some in the hotels, and others along the way. We were pleasantly surprised that even the smallest hotels served gourmet meals, great food and beautiful presentation. This was the vacation of our dreams and we were blessed to travel with our daughter and two granddaughters, ages 8 and 11. We were still in Iceland when the granddaughters talked of "when we come back to Iceland".

We then knew the trip was a success and we can't thank Gudrun and Nordic Visitor enough. All aspects of the trip exceeded my expectations and the service from first contact to arriving home was excellent. Thanks for the hard work that you put in and the variety of accommodation was just what was required.

A truly memorable stay in Iceland which I hope to repeat soon. The location of hotels so close to trains was excellent. Particularly liked the lovely new hotel in Trondheim and the interesting historic hotel in Bergen. Bjarni was available to answer our questions promptly while on the tour and arranged for our luggage transfer after the tour had started.

I travelled with family to Denmark, Norway and Sweden this month and had a fantastic time, thanks in large part to the excellent job that Nordic Visitor did in coordinating my trip.

I customized one of their Scandinavian package deals by extending my time in certain cities and Nordic Visitor accommodated my requests. The hotels that they booked were very nice and all were close to tourist attractions and public transportation.

The agency also booked some of the transportation, including a flight from Bergen to Stockholm, as well as all transportation for the Norway in a Nutshell tour, which was an awesome experience and the perfect way to take in the breathtaking scenery of the Norwegian mountains and fjords. I would definitely use Nordic Visitor again, if I ever decide to return to Scandinavia. My wife and I took the Iceland Full Circle self-drive tour in early June. We then stayed on in Reykjavik for a few days.

Our tour was arranged by Jelena. She was very helpful. We were very pleased with the tour.

CALCOLO DELLE PROBABILITA’ E STATISTICA

All of the arrangements were perfect. We enjoyed the inns where we stayed and the various tours that we took. Our first time in Iceland and the staff at Nordic Visitor made the whole experience so easy and hassle free. Cannot wait to see more of Iceland and will be booking with Nordic Visitor again.

Alexandra was the best consultant ever. So friendly and professional.CHU CHU CHARLIE amongst the placegetters last start running third at Hamilton on a soft track and has three placings from five runs this prep, don't treat lightly. COSTA LANTE racing back from the city and all wins have come when faced with dry ground, in with a chance. Flow Meter (1) 6. No Fairy (9) 1.

due esercizi di statistica

Duquessa (3) Hard to see anything upsetting the top two choices. CHENERS short back-up of six days and in strong form with two wins from nine attempts this campaign, a close top pick. FLOW METER short back-up of seven days and drawn perfectly, hard to hold out. NO FAIRY 4 from five wins have been in the dry and running 7.

DUQUESSA 4 from eight wins have been in the dry and racing back from metro track, don't treat lightly. Cavalry Gold (6) 2. Gold Seal (5) 1. Gangster's Run (3) Scratched 12. Jarrvis (9) CAVALRY GOLD comes back to race at a country level and won once this prep at Strathalbyn three runs back, well placed. GOLD SEAL gets going late and placed once this prep at Horsham, sneaky chance. GANGSTER'S RUN 2 of four wins have come from dry ground and comes back to race at a country level, still in this.

JARRVIS has good early speed and drops 2. Rubino Veloce (4) 2. Kalooki (1) AMMATE resumes after a 16 week spell and resumes well running second at Queanbeyan when last first-up, a close top pick. RUBINO VELOCE ran four lengths back from the winner at only start at Kembla but drops 1kg from last run, outside hope. ROBBERY resumes from an 18 week spell and resumes well, for the wider exotics.

KALOOKI on debut and placed in Moruya trial, consider in exotics. Fruitful Warrior (4) 6. Bundewallah Land (7) 1. Aim to Win (1) 5. Billy Can (8) FRUITFUL WARRIOR amongst the placegetters last start running third at Canberra and has two placings from six runs this prep, commands respect.

AIM TO WIN draws to do no work and has two placings from three runs this prep, looks threatening. BILLY CAN has good early speed and could come on strong to threaten, each-way claims.

Element of Luck (1) 2.


Comments

Leave a Reply

Your email address will not be published. Required fields are marked *