The course develops the key concepts of statistical inference and the main methods of sampling theory to be used in supporting managers and business decision-makers, Students can understand and to apply the bases of the typical advanced statistic methodology for these classes of degree and profit as tool of quantitative analysis to use to thin decisional in financial, economic and business circle. Teaching aims to mainly furnish three typologies of statistic tools:
• basic tools of statistic inference, that allow to report the picked information on a champion to the whole population. Introduced the fundamental concepts of the Calculation of the Probabilities, the principal inferential tools are faced as the confidence intervals and the tests. Moreover, the problem of independence test will be considered;
• tools related to the linear regression. The univariate linear model and multivariate linear model will be studied with the relative problems of respect and verification of hypothesis. These tools need use of MS Excel;
• in the third and last part it is considered, particularly, the sampling for the business audit, with several examples, proposed by Deloitte.