Statistical education for doing Statistics professionally: some challenges and the road ahead
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Statistical education for doing Statistics professionally: some challenges and the road ahead
Pedro Luis do Nascimento Silva
Escola Nacional de Ciências Estatísticas (ENCE/IBGE)
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Outline of Talk
• Who will be doing Statistics Professionally?
• How do we ‘teach’ each group?
• Statistical evolution and challenges
• Opportunities
• Some ideas and experiences
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Who Will Do Statistics Professionally: Three Major Groups (Paths)
• ‘Professional’ Statisticians: those who get a first degree in Statistics, who may or may not get further graduate education in Statistics
• ‘Graduate’ Statisticians: other professionals who will get formal statistical education only during post-graduate studies
• ‘Self-taught’ Statisticians: other professionals who will get statistical education through their work, but not through formal statistical education
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Professional Statisticians
• People who – Like “Math”– Choose career at an early age– Have limited knowledge of what the career
involves, because it not as well known as Engineering or Medicine
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Educating of Professional Statisticians
• Consequences– Low demand for places offered (around 5
candidates to 1 place here in Brazil)– Large drop out during undergraduate Statistics
courses– In Brazil, only about 1/3 of those which start
the course get the degree
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Brazil – Some Statistics On Undergraduate Programs
IndicatorYear
2001 2002 2003
Number of Courses 24 25 26
Places offered 1.331 1.423 1.464
Places occupied 1.154 1.269 1.145
Total enrolment 3.837 3.941 4.507
Graduates 353 266 390
Graduates/Places occupied
30,6% 21,0% 34,1%
Source: Census of Higher Education - INEP
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Undergraduate Programs in Statistics - Brazil
Source: Census of Higher Education - INEP
Graduates / Places occupied (%)
30,6%
21,0%
34,1%
0,0%
5,0%
10,0%
15,0%
20,0%
25,0%
30,0%
35,0%
40,0%
2001 2002 2003
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Professional Statisticians:Basic Curriculum 1970s
• Calculus and Linear Algebra• Descriptive Statistics (no EDA)• Scientific Computing (FORTRAN)• Probability Calculus• Statistical Inference• Design of Experiments• Linear Regression• Multivariate Analysis• Time Series Analysis
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Professional Statisticians: How We Were Taught -1970s
• Mathematics and Mathematical Statistics dominated the curriculum
• Emphasis on how to compute or to obtain statistical output, often “by hand”
• A students’ consumption dream in the 1970s • Little time spent on the analysis and interpretation
of the outcomes of the statistical work
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Changes Of The 1980s
• Mainframe computers • ‘General’ statistics packages (SPSS, SAS, BMDP)• In comes EDA • Mid 80s see the arrival of
– GLIM, CART, SPAD
– Plus many other specialized statistical software
• Accessibility limited to government agencies, main universities and large companies
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Changes of the 1990s
• Microcomputers • Spreadsheets and the
end of ‘manual’ statistical calculations
• PC statistical software (S & others)
• Statistics get into small businesses, even into the households
• Graphical displays and interactive data analysis
• Nonparametrics, smoothing
• Bootstrapping• Bayesian Statistics and
Simulation
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Most Recent Changes
• Internet ‘everywhere’
• Google Scholar
• R
• Who knows what comes next
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‘Graduate’ Statisticians
• People who – Get first impressions of Statistics during
undergraduate studies and/or at work– Get interested in Statistics via applications– Convert to Statistics career after first degree in
Engineering, Economics, Mathematics, Computer Science, even Medicine
• Learn Statistics for application in their areas of work / interest
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Graduate Statistical Education – Type 1 – ‘Traditional’ Orientation
• Probability Theory
• Stochastic Processes
• Mathematical Statistics
• Statistical Modeling (linear and nonlinear)
• Multivariate Analysis
• Time Series
• Then more specialized courses + thesis
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Graduate Statistical Education – Type 2 – Applications Orientation
• Biometrics
• Demography & Social Statistics
• Econometrics
• Operations research
• Process quality and control
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Type 2 ‘Graduate’ Statisticians: How Do They Learn Statistics?
• Data and problem driven presentation of methods and techniques application-oriented curriculum
• Limited time spent on theory• Specialized statistical ‘language’ for each
field• ?Do we see them as Statisticians?• ?Do they see themselves as Statisticians?
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Impact Of Evolving Technology
• Graduate statisticians– Dominate subject matter in application area– Less time spent in statistical calculations
• Professional statisticians– Increased opportunities for statistical work and
collaboration– Need to stay competitive permanent effort to
learn and keep track of statistical developments
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Some Key Questions
• What is important to know for doing Statistics professionally?
• What are the challenges of today’s and tomorrow’s statistical practice
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Statistical Challenges (1)• Data are messy, abundant and everywhere
• Data must be organised, processed, analysed and interpreted to be useful
• Ever increasing set of statistical tools (theory, methods, software) to obtain and analyse data
• Increasing demand for use of Statistics in almost every branch of human knowledge
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Statistical Challenges (2)
• Increasing complexity of problems and applications
• Increasing risk of misuse of Statistics, by users having access to sophisticated statistical tools, yet lacking of sufficient statistical competence
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Francisco Cribari Neto (2002)
• “Statistics biggest challenge is to promote the notion that Statistical Theory, Statistical Practice and Computational Statistics cannot be separated”
• Facing this challenge requires upgrading statistical education, as offered to both Professional and Graduate Statisticians
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Core Competence & Skills Required To Do Statistics Professionally (1)
• Solid knowledge of statistical principles and methods, as well as of their properties and limitations
• Capacity to recognize, formulate and resolve real problems involving data collection and analysis, applying such principles and methods in adequate manner
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Core Competence & Skills Required To Do Statistics Professionally (2)
• Capacity to collect, organise, process, analyse and present data using computing tools, fast and accurately
• Be critical and able to detect situations where existing methods do not work and need to be adapted or new ones developed
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Core Competence & Skills Required To Do Statistics Professionally (3)
• Effective communication both orally and in writing
• Working effectively in multidisciplinary teams
• Working effectively with existing technology
• Develop an attitude to learn continuously
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Are We Meeting the Challenge?
• Are we educating people and professionals with all these “core” competences and attitudes?
• If not, why?• What are the weaknesses of our standard
Statistical Education programs• And what do we do to “keep in shape” after
we complete our formal education?
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Some Barriers• Rigid curricula• Emphasis still reflects mathematical side of
Statistics, without sufficient effort to develop the other required competences
• Lots of “deductive teaching”, with proofs and demonstrations – mechanical, uninspiring
• Pedagogical approach is often old-fashioned• Teaching of Mathematics subjects dissociated
with the teaching of Statistics subjects
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John Nelder, 2005
“There are some people who want Statistics to be a part of Mathematics, which it can never be.”
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More Barriers• Limited use of modern learning tools and
resources• Low prevalence of using real and relevant
data and problems to present theory and develop practice
• Little emphasis on aspects of how to obtain data of good quality, and on methods to deal with data deficiencies– Eg.: missing data; detection and handling of
outliers; measurement errors; study design;
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Some Opportunities• Ever more powerful resources available• Evolution of statistical theory & methods• Open source, extensible, portable and free
statistical computing tools available• Abundance of data and examples of relevant
applications available to motivate and provide “learning by doing” opportunities
• Facilities available for distance education and learning, and cooperation
• Receptivity to the use of Statistics
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Estela Bee Dagum (2005)
• “Students must learn statistics by ‘doing’, ‘writing’ and ‘talking’ ”.
• “Teachers should be able to motivate their students by making classes more attractive”.
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Some Ideas to Move Forward
• Reorganise curricula for greater flexibility and balance regarding development of key competences
• Encourage introduction of new pedagogical approaches
• Increase use of real data and problems as learning tools
• Increase use of R, the internet, Google
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Some Ideas to Move Forward
• Incorporate fieldwork type projects as part of the learning curriculum
• Lead by example: Statistics teachers MUST do Statistics
• Mentoring and apprenticeship programs also to be made part of the curriculum
• Commitment with continued education throughout ones´ career, after graduation
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How We Can Improve• More research in statistical learning and education
– ICOTS, IASE, etc.
• More cooperation• Motivating and educating TEACHERS for using
new approaches and technologies• Give STUDENTS greater control over the learning
process Perhaps E-learning could help here
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How We Can Improve
• Quality pre-university statistical education introduced to provide basic statistical literacy even before university
• Greater involvement in projects and multidisciplinary teams
• Creating options for Statistics as complementary to other university courses
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Some Things We Tried At ENCE for Education Of Professional Statisticians
• Two semester credit units devoted to project development by teams of students
• Projects are required for graduation
• Students choose project topic and have one or two teachers as project supervisors
• Several projects relate to problems brought from students’ workplace
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Some Things We Tried At ENCE for Education Of Graduate Statisticians
• MSc. program providing statistical education for those interested in Demography and Social Research
• Survey skills development course• Capacity building at ENCE to enter the Distance
Learning era– Team devoted to run training courses for IBGE staff by
means of distance learning– One member of staff on leave doing PhD in subject to
return soon
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Electronic Distance Learning (EDL)
• A powerful new approach for teaching and learning, Statistics and many other things
• It takes advantage of new information and communication technologies
• It makes room for a more personalized learning experience, by allowing students or apprentices to make progress at their own pace, and to study anywhere, anytime
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Electronic Distance Learning (EDL)
• Within this new approach, students must be more pro-active in the learning process
• EDL replaces ‘traditional classrooms’ by ‘virtual learning communities’, using communications devices which enable remote synchronous and asynchronous interactions between teachers and students, or just between students
• Content dissemination may be enhanced by including interactive ‘materials’ that improve presentation and facilitate learning
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Electronic Distance Learning (EDL)
• Global costs of learning may be lower, after the initial investment on the required technology
• Opportunities are created for better integration of content preparation by different teachers
• Provides means for continued education both at the workplace or at home that would otherwise be unavailable with current approaches
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EDL Weaknesses
• It may lead to fewer interactions between students and teachers
• Group learning is more difficult• It may reduce student motivation sources and
opportunities• Those without technology and communications
skills and resources may be inhibited from participating, both teachers and students
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EDL Weaknesses
• Prejudice is still high about this type of teaching and learning approach
• Self-discipline is required from students• If learning is to happen at the workplace,
adequate conditions and time for study must be provided at the workplace too
• Assessment and certification are more challenging
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EDL – Critical Factors
• Although technology is often considered the essential component that must work well, to succeed EDL also requires fist rate content preparation coupled with adequate pedagogical treatment
• Hence EDL projects are very demanding in terms of the skills required to their development and execution, requiring important changes to teacher’s approaches to preparing and providing content, as well as about their role in the learning process
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EDL – Critical Factors
• Perhaps the difficulties in adapting to take advantage of this new approach explain why we still have so few examples of comprehensive projects in Statistical Education carried out by means of EDL
• But the size of the challenge should not discourage ourselves
• The larger are the challenge and the risks of the enterprise, the greater are the expected rewards
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EDL – Critical Factors
• We should consider ways to work together to develop this new approach and bring it into the mainstream of statistical education– At university (both undergraduate and postgraduate)
and professional levels (including continuing education at the workplace)
– In pre-university development of statistical literacy
• I encourage you to consider when and how you might get involved with this fascinating new world of EDL in statistics
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Official Statistics Agencies
• Can help statistical educators by providing access to data and other relevant support material for teaching
• Portugal: ALEA project – aims at providing both teachers and students of secondary education with teaching materials for the study of Statistics
• http://alea-estp.ine.pt/
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Official Statistics Agencies
• Canada
• E-STAT: – Interactive learning tool designed to support the
education community– Offers access to warehouse of statistics about
Canada and its people
• http://www.statcan.ca/english/Estat/intro.htm
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Official Statistics Agencies
• Brazil
• Learning support for children and teenagers– IBGE Teen
• http://www.ibge.gov.br/ibgeteen/frameset_open.html– IBGE 7 a 12
• http://www.ibge.gov.br/7a12/default.php
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Above All
• Develop an attitude to learn continuously
• And cooperate with others to achieve that
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Thank you for the attention! Enjoy ICOTS7 and Salvador!
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HP 67 Calculator
Source: http://www.hpmuseum.org/3qs/673q.jpg
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HP97 Calculator
Source: http://www.hpmuseum.org/97.jpg
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HP 67 Calculator
Source: http://www.hpmuseum.org/67.jpg
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IBM /370-148 (1976)
Source: http://www-03.ibm.com/ibm/history/exhibits/mainframe/mainframe_2423PH3148.html
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IBM-PC (1981)
Source: http://www-03.ibm.com/ibm/history/exhibits/pc/pc_1.html
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Evidence for Need to Learn Continuously
• How many operating systems have you had to learn ever since you started to use computers for statistical work?
• How many text processors have you learned to use to process your texts?
• How many statistical software packages have you had to learn throughout your career?
• How many new statistical techniques have you had to learn to improve upon your practice?