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====== Statistics for Data Science (628PP) A.Y. 2025/26 ======

=====Instructors=====

  * **Francesco Giannini**
    * Università di Pisa
    * [[https://www.francescogiannini.eu/]]
    * [[	francesco.giannini@unipi.it]]   
    * **Office hours:** Wednesday h 11:00 - 13:00 (to be confirmed via e-mail) or by appointment, at the Department of Computer Science, room 283/DO, or via Teams.

  * **Salvatore Ruggieri**
    * Università di Pisa
    * [[http://pages.di.unipi.it/ruggieri/]]
    * [[salvatore.ruggieri@unipi.it]]   
    * **Office hours:** Tuesdays h 16:00 - 18:00 or by appointment, at the Department of Computer Science, room 321/DO, or via Teams.

=====Hours and rooms=====

^  Day of Week  ^  Hour  ^  Room  ^ 
|  Tuesday  |  14:00 - 16:00  |  Fib-C  | 
|  Wednesday  |  9:00 - 11:00  |  Fib-C1  | 
|  Friday  |  9:00 - 11:00  |  Fib-C1  | 


=====Pre-requisites=====

Students should be comfortable with most of the topics on mathematical calculus covered in:

  * **[P]** J. Ward, J. Abdey. **Mathematics and Statistics**. University of London, 2013. __Chapters 1-8 of Part 1__.

Extra-lessons refreshing such notions may be planned in the first part of the course.


=====Mandatory Teaching Material=====

The following are //mandatory text books//:

  * **[T]** F.M. Dekking C. Kraaikamp, H.P. Lopuha, L.E. Meester. **A Modern Introduction to Probability and Statistics**. Springer, 2005.
  * **[R]** P. Dalgaard. **Introductory Statistics with R**. 2nd edition, Springer, 2008.
  * selected chapters of other books for advanced topics 

=====Software=====

  * [[https://cran.r-project.org/|R]]
  * [[https://posit.co/download/rstudio-desktop/|R Studio]]

=====Preliminary program and calendar=====

  * [[https://unipi.coursecatalogue.cineca.it/corsi/2025/11357/insegnamenti/2025/53385_703139_77399/2025/53385_9386?schemaid=9386|Preliminary program]].
  * [[https://didattica.di.unipi.it/en/master-programme-in-data-science-and-business-informatics/academic-calendar-2025-2026/|Calendar of lessons]].


=====Exams=====

__//There are no mid-terms//.__ The exam consists of a written part and an oral part. The written part consists of exercises and questions on the topics of the course. Each question is assigned a grade, summing up to 30 points. Example written texts: **{{ :mds:sds:sds_sample1.pdf | sample1}}**, **{{ :mds:sds:sds_sample2.pdf | sample2}}**. Students are admitted to the oral part if they receive a grade of at least 18 points. The oral part consists of critical discussion of the written part and of open questions and problem solving on the topics (both theory and R programming) of the course. In particular, students must demonstrate to be able to summarize both the theory and the software related to any of the lessons using the slides and R scripts of the lessons.

Registration to exams is mandatory (**beware of the registration deadline!**): [[https://esami.unipi.it/esami2/|register here]]. **The dates below are only for the written test (normal exam).
Dates for project discussion are included in the project description**.\\

^  Date  ^  Hour  ^  Room  ^  Notes  ^
|  9/3/2026  |  16:00 - 18:00  |  Fib-Lab-I  | [[https://didattica.di.unipi.it/en/appelli-straordinari/|Extra-ordinary exam]] |


=====Student project=====

  * The project replaces the written part of the examination
  * Project description and rules and Q&A will be published here in April.


=====Class calendar=====


A [[https://teams.microsoft.com/l/team/19%3A-If1d77k4OlNtK9Zh26shFvA5wni-qgETvMGraQaBnU1%40thread.tacv2/conversations?groupId=18a8945a-bb15-4d30-b3c4-869df7fd4b6d&tenantId=c7456b31-a220-47f5-be52-473828670aa1|Teams channel]] is used to post news, notes, Q&A, and other stuff related to the course. 

The lectures will be only in presence and will **NOT** be live-streamed. Recordings from previous years are available for non‑attending students (see the past years section below); however, these materials may not fully correspond to the content taught in the current academic year.

Calendar and material of future lessons refer to the last academic year. Schedule, slides and R scripts might be updated **after the classes** to align with actual content of current year and to correct typos. //Be sure to download the updated versions.//

^ # ^ Date ^ Room ^ Topic ^ Mandatory teaching material ^ 
|01| 17/02 14-16 | Fib-C | Introduction. Probability and independence. | **[T]** Chpts. 1-3 {{:mds:sds:sds01.pdf|slides01 (.pdf)}}|
|02| 18/02 9-11 | Fib-C1 | R basics. | **[R]** Chpts. 1,2.1-2.3 {{:mds:sds:sds02.pdf|slides02 (.pdf)}},  {{:mds:sds:sds02.r|script02 (.R)}}| 
|03| 20/02 9-11 | Fib-C1 | Bayes' rule and applications. | **[T]** Chpt. 3 {{:mds:sds:sds03.pdf|slides03 (.pdf)}},  {{:mds:sds:sds03.r|script03 (.R)}}| 
|04| 24/02 14-16 | Fib-C | Discrete random variables. | **[T]** Chpts. 4, 9.1, 9.2, 9.4 **[R]** Chpt. 3 {{:mds:sds:sds04.pdf|slides04 (.pdf)}},  {{:mds:sds:sds04.r|script04 (.R)}}| 
|05| 25/02 9-11 | Fib-C1 | Discrete random variables (continued). |  |
|06| 27/02 9-11 | Fib-C1 | Recalls: derivatives and integrals. | **[P]** Chpt. 1-8 {{:mds:sds:sds06.pdf|slides06 (.pdf)}},  {{:mds:sds:sds06.r|script06 (.R)}}|
|07| 03/03 14-16 | Fib-C | R data access and programming. | **[R]** Chpt. 2.3,2.4 {{:mds:sds:sds07.zip|script07 (.zip)}} |
|08| 04/03 9-11 | Fib-C1 | Continuous random variables. | **[T]** Chpts. 5, 9.2-9.4 **[R]** Chpt. 3 {{:mds:sds:sds08.pdf|slides08 (.pdf)}},  {{:mds:sds:sds08.r|script08 (.R)}}| 
|09| 06/03 9-11 | Fib-C1 | Expectation and variance. Computations with random variables. | **[T]** Chpts. 7,8 {{:mds:sds:sds09.pdf|slides09 (.pdf)}},  {{:mds:sds:sds09.r|script09 (.R)}}|
|10| 10/03 14-16 | Fib-C | Expectation and variance. Computations with random variables (continued). Moments. Functions of random variables.  | **[T]** Chpts. 9-11 {{:mds:sds:sds10.pdf|slides10 (.pdf)}}, {{:mds:sds:sds10.zip|script10 (.zip)}} |
|11| 11/03 9-11 | Fib-C1 | Functions of random variables (continued). Distances between distributions. | {{:mds:sds:murphychpt6.pdf|Murphy's book}} Chpt. 6  {{:mds:sds:sds11.pdf|slides11 (.pdf)}}, {{:mds:sds:sds11.R|script11 (.R)}} |
|12| 13/03 9-11 | Fib-C1 | Simulation. | **[T]** Chpts. 6.1-6.2 {{:mds:sds:sds12.pdf|slides12 (.pdf)}},  {{:mds:sds:sds12.r|script12 (.R)}} {{:mds:sds:sds12_sol07.r|script12_sol07 (.R)}}|
|14| 17/03 14-16 | Fib-C | Law of large numbers. The central limit theorem.  | **[T]** Chpts. 13-14  {{:mds:sds:sds14.pdf|slides14 (.pdf)}}, {{:mds:sds:sds14.R|script14 (.R)}} |
|15| 18/03 9-11 | Fib-C1 | Graphical summaries. Kernel Density Estimation.  | **[T]** Chpt. 15, **[R]** Chpt. 4  {{:mds:sds:sds15.pdf|slides15 (.pdf)}}, {{:mds:sds:sds15.r|script15 (.R)}}|
|13| 20/03 9-11 | Fib-C1 | Power laws and Zipf's law. | [[https://arxiv.org/pdf/cond-mat/0412004.pdf | Newman's paper]] Sect I, II, III(A,B,E,F) {{:mds:sds:sds13.pdf|slides13 (.pdf)}},  {{:mds:sds:sds13.r|script13 (.R)}}|
|16| 24/03 14-16 | Fib-C | Numerical summaries. | **[T]** Chpt. 16, **[R]** Chpt. 4 {{:mds:sds:sds16.pdf|slides16 (.pdf)}}, {{:mds:sds:sds16.r|script16 (.R)}} |
|17| 25/03 9-11 | Fib-C1 |Data preprocessing in R. Estimators.| **[R]** Chpt. 10, **[T]** Chpts. 17.1-17.3{{:mds:sds:sds17.r|script17 (.R)}}, {{ :mds:sds:dataprep.r | dataprep.R}} |
|18| 27/03 9-11 | Fib-C1  | Unbiased estimators. Efficiency and MSE. | **[T]** Chpts. 19, 20  {{:mds:sds:sds18.pdf|slides18 (.pdf)}}, {{:mds:sds:sds18.r|script18 (.R)}} |
|19| 31/03 14-16 | Fib-C | Maximum likelihood estimation. | **[T]** Chpt. 21 {{ :mds:sds:sdsln.pdf |}} Chpt. 1  {{:mds:sds:sds19.pdf|slides19 (.pdf)}}, {{:mds:sds:sds19.r|script19 (.R)}} |
|20| 01/04 9-11 | Fib-C1  | Linear regression. Least squares estimation. | **[T]** Chpts. 17.4,22 **[R]** Chpt. 6 {{ :mds:sds:sdsln.pdf |}} Chpt. 2 {{:mds:sds:sds20.pdf|slides20 (.pdf)}}, {{:mds:sds:sds20.r|script20 (.R)}} |
|21| 08/04 9-11 | Fib-C1  | Non-linear, and multiple linear regression. | **[R]** Chpt. 12.1,13,16.1-16.2 {{ :mds:sds:sdsln.pdf |}} Chpt. 2 {{:mds:sds:sds21.pdf|slides21 (.pdf)}}, {{:mds:sds:sds21.R|script21 (.R)}} |
|22| 10/04 9-11 | Fib-C1  | Issues with linear regression. Logistic regression. | **[R]** Chpt. 12.1,13,16.1-16.2 {{:mds:sds:sds22.pdf|slides22 (.pdf)}}, {{:mds:sds:sds22.zip|script22 (.zip)}} |
|23| 14/04 14-16 | Fib-C  | Statistical decision theory. | {{ :mds:sds:sdsln.pdf |}} Chpt. 4 {{:mds:sds:sds23.pdf|slides23 (.pdf)}}, {{:mds:sds:sds23.r|script23 (.R)}} |
|24| 15/04 9-11 | Fib-C1  | Statistical decision theory (continued). |  |
|25| 17/04 9-11 | Fib-C1 | Statistical decision theory (continued). Project presentation. |   |
|26| 21/04 14-16 | Fib-C | Confidence intervals: mean, proportion, linear regression. | **[T]** Chpts. 23.1,23.2,23.4,24.3,24.4 {{ :mds:sds:sdsln.pdf |}} Chpt. 3 {{:mds:sds:sds26.pdf|slides26 (.pdf)}}, {{:mds:sds:sds26.r|script26 (.R)}} |
|27| 22/04 9-11 | Fib-C1 | Confidence intervals (continued). Bootstrap and resampling methods. | **[T]** Chpts. 18.1-18.3,23.3 {{:mds:sds:sds27.pdf|slides27 (.pdf)}}, {{:mds:sds:sds27.r|script27 (.R)}} |
|28| 24/04 9-11 | Fib-C1 | Bootstrap and resampling methods (continued). |   |
|29| 28/04 14-16 | Fib-C | Hypotheses testing. One-sample tests of the mean and application to linear regression. | **[T]** Chpts. 25,26,27, **[R]** Chpts. 5.1,5.2 {{ :mds:sds:sdsln.pdf |}} Chpt.3.3 {{:mds:sds:sds29.pdf|slides29 (.pdf)}}, {{:mds:sds:sds29.r|script29 (.R)}} |
|30| 29/04 9-11 | Fib-C1 | One-sample tests of the mean and application to linear regression (continued). Classifier performance metrics in R.  | {{:mds:sds:sds30.pdf|slides30 (.pdf)}}, {{:mds:sds:sds30.r|script30 (.R)}} |
|31| 30/04 11-13 | Fib-C | Two-sample tests of the mean and applications to classifier comparison.  | **[T]** Chpt. 28, **[R]** Chpts. 5.3-5.7 {{:mds:sds:sds31.pdf|slides31 (.pdf)}}, {{:mds:sds:sds31.r|script31 (.R)}} |
|32| 06/05 9-11 | Fib-C1 | Multiple-sample tests of the mean and applications to classifier comparison. | **[R]** Chpt. 7 {{:mds:sds:sds32.pdf|slides32 (.pdf)}}, {{:mds:sds:sds32.r|script32 (.R)}} |
|33| 08/05 9-11 | Fib-C1 | Fitting distributions. Testing independence/association. | **[R]** Chpt. 8 {{ :mds:smd:ks.pdf | K-S}}, {{:mds:sds:sds33.pdf|slides33 (.pdf)}}, {{:mds:sds:sds33.r|script33 (.R)}} |
|34| 12/05 14-16 | Fib-C | Fitting distributions. Testing independence/association (continued).   |  |
|35| 13/05 9-11| Fib-C1 | //Mandatory seminar:// TBD |  |
|36| 15/05 9-11 | Fib-C1 | Project Q&A.  |  |

Lessons not held (due to strikes or other unforeseen circumstances) will be rescheduled on the following dates: 19, 20, 22, 26, 27, and 29 May.


=====Past years=====

  * [[mds:sds:2024|Statistics for Data Science A.Y. 2024/25]]
  * [[mds:sds:2023|Statistics for Data Science A.Y. 2023/24]]