Calculo da Amostra. This Sample Size Calculator is presented as a public service of Creative Research Systems survey software. You can use it to determine how many people you need to interview in order to get results that reflect the target population as precisely as needed. You can also find the level of precision you have in an existing sample. Before using the sample size calculator, there are two terms that you need to know. These are: confidence interval and confidence level. If you are not familiar with these terms, click here.
To learn more about the factors that affect the size of confidence intervals, click here. Enter your choices in a calculator below to find the sample size you need or the confidence interval you have. Sample Size Calculator Terms: Confidence Interval & Confidence Level The confidence interval (also called margin of error) is the plus-or-minus figure usually reported in newspaper or television opinion poll results. The confidence level tells you how sure you can be. Sample Size. Marketing Político e Assessoria para Candidatos, Vereadores, Pre.
::Exata Pesquisas:: DEMOSKOPIA - Pesquisa de Mercado, Opinião Pública e Mídia - EMPR. Surveys - Zoomerang. Instituto MAPA - Pesquisa e Informação Estratégica. Sphinx. TRE-SC.