1,720,968 research outputs found
Estimating the Size of the Poulation of Cannabis Users to Evaluate Drug Policies: a Comparison Between Different Metropolitan Areas in Italy
No full text
New trends in illicit drug use, new challenges for policy and interventions: figures from the consumption side and the supply side.
No full textLa stima dei consumatori abituali
No full textIllicit Drug Market Workshop:
Stima della prevalenza e incidenza dell'uso di droga: banche dati, modelli e metod
Useful supply indicators for evaluating law enforcement efficacy, the size of the drug market and other issues
No full textSound supply indicators are needed to provide evidence for understanding drug markets and assessing policies.
The size of dealer population is not known.
Capture-recapture procedures in the presence of a single data source are applied for estimating this population.
The estimated size of dealer population is proposed as a drug supply indicato
Il gioco del lotto: spunti didattici utilizzando il sito italiano del gioco.
No full textDa tempo si parla di un approccio all’insegnamento della matematica e della statistica basato sui concetti, sui modelli e sulle loro applicazioni, piuttosto che su schemi astratti, formule e calcoli. Questo approccio implica l’uso di strategie che stimolino l’apprendimento attivo e aiutino lo studente a costruire la propria esperienza pratica e intellettuale. Il gioco del lotto può fornire numerosi spunti adatti ad introdurre diversi concetti di probabilità e statistica quali il concetto di casualità, di modello probabilistico e di test di bontà dell’adattamento
Capture - Recapture Methods to Estimate Prevalence Indicators for the Evaluation of Drug Policies
No full textIl metodo della cattura-ricattura:un esperimento didattico tra matematica e scienze naturali.
No full textThe capture-recapture method is a particular type of repeated sampling. It has been widely used to estimate the size of wildlife populations and recently it has found new applications to human populations. In this note, we illustrate both biological and epidemiological applications of the method with the purpose of supplying teaching material which could be used in introductory statistics classes. The capture-recapture model is a two sample model involving sampling without replacement from a finite population and the use of a hypergeometric distribution. First we see how the estimator of the population size can be obtained in a simple and intuitive way; we also show its equivalence to the maximum likelihood estimator. Then we propose a simulation-based activity to illustrate some important concepts in statistics: the concept of estimator, of sampling distribution and confidence interval. Varying the experiment parameters we compare different scenarios and discuss the properties of the estimators. Epidemiological applications are concerned with the estimation of the size of a hidden population such as drug users and illegal immigrants populations
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