Stratified sampling

The R `sampling' package Alina Matei and Yves Tillé University of Neuchâtel Euskal Estatistika Erakundea XXIII Seminario Internacional de Estadística November 2010 Alina Matei and Yves Tillé () The R `sampling' package November 2010 1 / 13 Introduction and aim The R language The R language Shareware available on http://cran.r-project.org/ The Comprehensive R Archive Network Installation: 10 minutes All the manuels are available in pdf Everyone can write an additional

are representative of the whole population at a lower cost than collecting the data for the whole population” (Saunders et al: 2009, pp 144). There are some difficulties of using this strategy which will be considered in the data collection. b) Sampling strategy: Due to the huge number of customers and the huge geographical business operation, the population will be divided into strata. Each stratum will be the departure country or the departure city for domestic journeys which will be a stratum

steps that will take place and the order that they will take place. Sampling is the process of selecting a number of individuals for a study in such a way that the individuals represent the larger group from which they were selected. Random sampling is the process by which all individuals in the defined population have an equal and independent chance of being selected for the sample. Stratified Sampling is the process of selecting a sample in such a way that the sample represents

the advertising in the gay’s Medias 16 1.10 Conclusion 17 Chapter 2: Research Methodology 18 2.1: Problem definition 18 2.2: Research Objectives and Hypothesis 18 2.3: Research Design Strategy 19 2.4: Data Collection Methods 20 2.5: Sampling 22 2.6: Fieldwork 24 Chapter 3: Data Analysis: Findings & Analysis 26 Chapter 4: Conclusion and Recommendations 35 4.1: Conclusion 35 4.2 Recommendations 38 Appendices 39 Bibliography 44 List of figures Figure 1: In which social

purchases chicken just at Tesco. 3.9 Questionnaire Sampling The questionnaire will be sent to a 100 Tesco customers and potential participants. For the purpose of this research paper, Random Sampling method will be used as this enables every single individual a chance of selection from a list of the population. If however, this method cannot be adopted, then, Stratified Sampling method will be applied. This is a variant of Random Sampling technique which classifies population in sub groups such

Interviewing Focus groups Questionnaires Participant observation Choosing your methods Summary Further reading 4 How to Conduct Background Research Primary research and secondary research Summary Further reading 5 How to Choose Your Participants Sampling Sample size Summary Further reading 6 How to Prepare a Research Proposal The contents of a proposal ix 1 1 4 13 14 14 22 23 27 27 29 30 32 33 37 38 40 40 45 46 47 47 49 53 54 55 56 v vi / P R A C T I C A L R E S E A R C H M E T H O D S

model for exploiting film tourism marketing opportunities Conceptual Framework for Understanding film tourism Continuum of film induced motivation emergent themes and associated issues Pure and mixed research approaches The multi-method approach The Sampling Design Process County Map of Yorkshire, UK art of the strategic conversation Stages of qualitative data analysis Yorkshire Different in Reality Television Series Related Information Journey of theoretical thinking Before Release – Planning After

making it very difficult to buy each security in the same proportion as the index, because the transaction cost of doing this would be very high. Some techniques are use in order to constitute an indexed bond portfolio, one of them is doing a stratified sampling or cellular approach, but we will speak about it later on. The second problem that appears when doing a bond indexed portfolio refers to the fact that bonds have maturity dates, and this means that when maturity date arrives the bond drop

a list of geographically stratified telephone numbers. The actual number of households telephoned varied by centre. The sample size was set to get profile characteristics for 400 purchase intenders, 800 renovating households and 1,200 households who intend to renovate. The actual sample size was determined based on the centre’s expected response rate and the incidence rate of the four characteristics of interest. The survey results were weighted according to the sampling scheme and adjusted for non-response

performances. - The mastery of pupil's personality by the teacher stimulates academic performances. In Oder to treat our topic, we opted for and explanatory method; and the sample was constituted of probability method; notably proportional stratified sampling. In gathering information, we used a questionnaire which was addressed to 200 pupils of BOGSO, MAPAN, SONG-HOT public schools, group B of ESKA public school and group I of public school annex of ENIEG. After the presentation of data collected