Search results for "Statistic"

On overall sampling plan for small area estimation

2017

The time and budget restrictions in survey sampling can impose limits on the area sample sizes. This may reduce the possibility to obtain area-specific and population parameters estimates with adequate precision. Market research companies and institutes for producing official statistics face frequently this problem. Various models and methods for small area estimation (SAE) have been developed to solve this problem. The sample allocation must support the selected model and method to ensure efficient estimation and must be implemented in the design phase of the survey. The proposed allocation is developed by incorporating auxiliary information, a model, and an estimation method. The estimate…

On the Sampling Size for Inverse Sampling

2022

In the Big Data era, sampling remains a central theme. This paper investigates the characteristics of inverse sampling on two different datasets (real and simulated) to determine when big data become too small for inverse sampling to be used and to examine the impact of the sampling rate of the subsamples. We find that the method, using the appropriate subsample size for both the mean and proportion parameters, performs well with a smaller dataset than big data through the simulation study and real-data application. Different settings related to the selection bias severity are considered during the simulation study and real application.

Sampling in Local Tourism Quantification: Critical Issues and Field Experience

2013

The aim of this paper is to detail some issues relating to tourist sampling by means of three case studies. Tourism quantification issues and solutions will be illustrated in three paradgmatic situations: sampling in a self-contained context with multiple access points (an Island in Aeolian archipelago), tourism in a seaside town, and nautical tourism. In these contexts the issue of building a space-time grid to circumscribe the target population is made more complex by the mobile nature of these populations.

Dead wood profile of a semi-natural boreal forest – implications for sampling

2019

Dead wood profile of a forest is a useful tool for describing forest characteristics and assessing forest disturbance history. Nevertheless, there are few studies on dead wood profiles, including both coarse and fine dead wood, and on the effect of sampling intensity on the dead wood estimates. In a semi-natural boreal forest, we measured every dead wood item over 2 cm in diameter from 80 study plots. From eight plots, we further recorded dead wood items below 2 cm in diameter. Based on these data we constructed the full dead wood profile, i.e. the overall number of dead wood items and their distribution among different tree species, volumes of different size and decay stage categories. We …

Satisfação Profissional no Docente Dominicano: Antecedentes Profissionais

2019

Resumen La satisfacción laboral del colectivo docente ha sido estudiada desde diversas perspectivas, debido a los importantes efectos que esta puede tener tanto a nivel económico como a nivel organizacional. La muestra empleada en este trabajo se compone de 978 docentes dominicanos, y fue obtenida mediante un muestreo estratificado, y, por tanto, representativo de la población. En este estudio se examina un modelo de ecuaciones estructurales en el cual el contexto de trabajo y las condiciones laborales afectan el burnout y el engagement de los profesores. A su vez, se plantea que burnout y engagement afectan la satisfacción laboral docente. El modelo ajustó a los datos: x2(223)= 1089.9, p<.…

I laureati triennali

2010

I laureati specialistici

2010

I laureati a ciclo unico

2010

Analisi per Ateneo. L'Università degli studi di Palermo.

2011

Il capitolo mette in evidenza le caratteristiche salienti dei profili post-laurea dei laureati dell'ateneo di Palermo elaborati attraverso un'indagine campionaria. Il capitolo tratta anche un approfondimento dei laureati delle principali caratteristiche socio demografiche.

Measurement awareness: the Use of Indicators between Expectations and Opportunities

2004

In questo lavoro sono discussi problemi di merito e di metodo che si presentano allorquando ci si imbatte nell''articolato processo di costruzione di un indicatore composto. Alcuni temi discussi con riguardo agli indicatori sociali sono, quindi, richiamati pur senza analizzare la varietà e la specificità degli apparati definitori e dei sistemi classificatori reperibili nella vastissima letteratura. Una particolare attenzione è rivolta all''analisi del rapporto fra indicatori e costruzione delle scale, che si conclude con l''illustrazione di un esempio, ancora in progress, che mette in risalto la distanza che tuttora separa volontà conoscitiva e fattibilità operativa.