30456  STATISTICS  MODULE 1 (THEORY AND METHODS)
Department of Decision Sciences
Course taught in English
Go to class group/s: 13
Course Director:
CHIARA GIGLIARANO
CHIARA GIGLIARANO
Lezioni della classe erogate in presenza
Suggested background knowledge
In order to successfully attend the course it is recommended to possess a good knowledge of the basic notions of mathematics, in particular derivatives, integrals, logarithmic and exponential functions.
Mission & Content Summary
MISSION
The aim of the course is to provide students with a first introduction to the main concepts of statistical thinking, both descriptive and inferential. The most relevant techniques for collecting and analyzing data are first explored. The course then introduces the fundamental principles of probability theory and random variables, as a basis for better understanding the point estimation theory. The focus is on analyzing real data, illustrating some of the methods and concepts with the help of the statistical software R.
CONTENT SUMMARY
The course focuses on the following main topics:
 Basic univariate exploratory data analysis: frequency distributions, graphical representations, summary statistics of centrality and variability.
 Basic bivariate exploratory data analysis: contingency tables, summary statistics of linear association, simple linear regression model.
 Probability: elementary set theory, events, algebras, axiomatic definition, conditional probability and elementary rules of calculus, Bayes' rule.
 Random variables: discrete and continuous distribution, expectation and moments, common families of distributions (Bernoulli, binomial, geometric, Poisson, uniform, normal, negative exponential).
 Functions of random variables.
 Random vectors: joint, marginal and conditional distributions, covariance and correlation coefficient, stochastic independence.
 Multivariate normal distribution.
 Sampling: population and sample, inferential process, sample variability and sampling error, statistics.
 Sample mean: expected value and variance.
 Sampling from a normal population: sample mean and sample variance properties.
 Central limit theorem and convergence in distribution. The Weak Law of Large Numbers and convergence in probability.
 Properties of estimators: unbiasedness, consistency and mean squared error. Asymptotic properties of estimators: weak and strong consistency.
Intended Learning Outcomes (ILO)
KNOWLEDGE AND UNDERSTANDING
At the end of the course student will be able to...
 Understand the fundamentals of statistical thinking, both descriptive and inferential.
 Reproduce the basics of descriptive statistics to economic data analysis.
 Illustrate the main concepts of probability and point estimation theory.
 Analyze real dataset on different socioeconomic phenomena, with the aid of an adequate computer software.
APPLYING KNOWLEDGE AND UNDERSTANDING
At the end of the course student will be able to...
 Summarize and visualize information contained in real data sets.
 Study the relationship between relevant variables.
 Choose adequate probabilistic models to represent data and learn from it in a statistical setting.
 Estimate unknown population parameters based on sampling information.
 Interpret the obtained results.
Teaching methods
 Facetoface lectures
 Exercises (exercises, database, software etc.)
DETAILS
Teaching and learning activities for this course are divided into:
 Facetoface lectures during which statistical methods are explained and discussed.
 Exercises on quantitative methods.
 Applications on real data using the statistical software R.
Assessment methods
Continuous assessment  Partial exams  General exam  


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x  x 
ATTENDING AND NOT ATTENDING STUDENTS
With the purpose of measuring the acquisition of the abovementioned learning outcomes, the students’ assessment is based on two main components:
 Final written exam (90% of the final grade). The written exam consists of exercises and closed and/or open questions aimed to assess students’ ability to apply properly the statistical tools illustrated during the course, to summarize information contained in datasets, to study the relationship between variables, to choose adequate probability models as well as to estimate unknown parameters.
 Home assignments (10% of the final grade), consisting in a PC project aimed to test the students’ ability to analyze a real dataset with the statistical software R and discuss critically the output.
Teaching materials
ATTENDING AND NOT ATTENDING STUDENTS
For both attending and nonattending students:
 S. M. ROSS, Probability and Statistics for Engineers and Scientists, Elsevier Press, Fifth Edition.
 Additional teaching materials are announced before the start of the course and indicated on the Bboard platform. The slides of the course and additional exercises are uploaded to the Bboard platform of the course.
Last change 14/12/2020 17:33