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2022/2023

Statistical Inference 2

Code: 104856 ECTS Credits: 6
Degree Type Year Semester
2503852 Applied Statistics OB 2 1

Contact

Name:
Noelia Viles Cuadros
Email:
noelia.viles@uab.cat

Use of Languages

Principal working language:
catalan (cat)
Some groups entirely in English:
No
Some groups entirely in Catalan:
Yes
Some groups entirely in Spanish:
No

Prerequisites

It is recommended that you have passed the Calculation, Probability and Inference-1 subjects.

Objectives and Contextualisation

In this course, the concept of Inference must be based fundamentally, that is, how the Statistics quantifies the uncertainty of the information extracted from the data. The concepts of Modeling, Estimate and Swing of Adjustment will be introduced.
The different methods of estimation will be studied, especially the maximum veracity method, and the fundamental properties of the estimators: Invariantness, sufficiency, efficiency, bias, quadratic mean error and asymptotic properties.

Competences

  • Analyse data using statistical methods and techniques, working with data of different types.
  • Correctly use a wide range of statistical software and programming languages, choosing the best one for each analysis, and adapting it to new necessities.
  • Make efficient use of the literature and digital resources to obtain information.
  • Select statistical models or techniques for application in studies and real-world problems, and know the tools for validating them.
  • Select the sources and techniques for acquiring and managing data for statistical processing purposes.
  • Students must be capable of applying their knowledge to their work or vocation in a professional way and they should have building arguments and problem resolution skills within their area of study.
  • Students must be capable of communicating information, ideas, problems and solutions to both specialised and non-specialised audiences.
  • Summarise and discover behaviour patterns in data exploration.
  • Use quality criteria to critically assess the work done.

Learning Outcomes

  1. Analyse data through different inference techniques using statistical software.
  2. Analyse data through various inference techniques for one or more samples.
  3. Critically assess the work done on the basis of quality criteria.
  4. Identify statistical distributions.
  5. Identify statistical inference as an instrument of prediction.
  6. Interpret the results obtained and formulate conclusions regarding the experimental hypothesis.
  7. Make effective use of references and electronic resources to obtain information.
  8. Purge and store information on digital media.
  9. Students must be capable of applying their knowledge to their work or vocation in a professional way and they should have building arguments and problem resolution skills within their area of study.
  10. Students must be capable of communicating information, ideas, problems and solutions to both specialised and non-specialised audiences.
  11. Understand the concepts associated with hypothesis tests in classical and Bayesian statistics.
  12. Use statistical software to obtain summary indices of the variables in the study.
  13. Use the properties of the functions of distribution and density.
  14. Validate and manage information for statistical processing.

Content

Topic 1: Modeling and Inference.
• Estimation methods: moments, maximum likelihood, minimum squares. Principle of invariance. Calculation of moments and generating functions.
• Comparison of estimators: Bias and half quadratic error. Consistency and asymptotic normality.
• Cramér-Rao Fisher and Cota information. Sufficiency and Efficiency.
• Exponential models. Numerical methods for estimation.
Topic 2: Contrasts of hypotheses
• Fisher's exact theory. Type of error Null and alternative hypothesis.
• Motto by Neyman and Pearson. Feasibility tests reasonably.
• Validation of the model and goodness of adjustment. Pearson Tests, Kolmogorov-Smirnov, Jarque Bera. Graphics tools: PP-plot and QQ-plot.
Topic 3: Asymptotic theory.
• Properties of convergence in probability and distribution.
• Slutsky theorem. The delta method.
• Asymptotic distribution of the maximum veracity estimator.
• Asymptotic distribution of the scoring, verifiability and Wald test results.

 

Unless the requirements enforced by the health authorities demand a prioritization or reduction of these contents.

 

Methodology

The subject is structured from theoretical classes, problems and practices. The follow-up of the subject must be present, but it will be necessary to extend the teacher's explanations with the student's autonomous study, with the support of the reference bibliography.
  The problem class will be devoted to the resolution oriented of some proposed problems. Students' participation in problem classes will be especially valued. In practical classes, Excel and R. software tools will be introduced. You will have to deliver some practical work.

 

The proposed teaching methodology may experience some modifications depending on the restrictions to face-to-face activities enforced by health authorities

Annotation: Within the schedule set by the centre or degree programme, 15 minutes of one class will be reserved for students to evaluate their lecturers and their courses or modules through questionnaires.

Activities

Title Hours ECTS Learning Outcomes
Type: Directed      
Practical work with computer tools 30 1.2 1, 2, 5, 6, 12
Practices 12 0.48 1, 2, 6, 12
Problems 14 0.56 2, 3, 5, 6, 7
Theory 26 1.04 1, 2, 3, 11, 4, 5, 6, 10, 9, 7, 13, 12, 14
Type: Supervised      
Tutorials 5 0.2 10, 9
Type: Autonomous      
Study and think problems 30 1.2 11, 5, 6, 13

Assessment

The subject will be assessed with practice assignments, problem controls, practices, and exams. The examinations can only be recovered together at the end, as long as the student has previously passed a 3 in each partial. Work in general is not recovered.

 

Student’s assessment may experience some modifications depending on the restrictions to face-to-face activities enforced by health authorities.

Assessment Activities

Title Weighting Hours ECTS Learning Outcomes
Final exam 40% 8 0.32 2, 3, 11, 8, 4, 5, 6, 10, 9, 13, 14
Partial exam 35% 5 0.2 2, 8, 4, 6, 10, 9, 13, 14
Practices (deliveries, controls) 25% 20 0.8 1, 2, 3, 11, 8, 4, 5, 6, 10, 9, 7, 13, 12, 14

Bibliography

  1. Casella, G..and Berger, R. (2002) . Statistical Inference, 2º ed. Wadsworth, Belmont, CA.
  2. Casella, G., Berger, R. and Santana, D. (2002). Solutions Manual for Statistical Inference, Second Edition.
  3. Luis Ruiz Maya Pérez, Francisco Javier Martín-Pliego López. (2006). Estadística. II, Inferencia. Editoria AC.
  4. Millar, R. (2011). Maximum Likelihood Estimation and Inference. Wiley.
  5. D. Peña. (2002). “Fundamentos de Estadística”. Alianza Editorial.

Software

R