All posts by Ian Stark

Exam Results

Picture of buntingAll exam results should now be available through EUCLID. A total of 278 students sat the Inf1-DA exam this year, with over 95% passing and very many achieving Grade A. Those are excellent results, congratulations.

I’ll publish a more detailed feedback report later, with information about student solutions to all of the exam questions. If you have questions or concerns about your result in this or any other course then contact your Personal Tutor to discuss this further.
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Student Course Feedback

Screenshot of survey pagePlease fill out the short online feedback survey for Inf1-DA. This is organised centrally by the University, with all results sent to the individual course organiser and to the Director of Teaching. I read every comment individually, and for Informatics courses we post results online to help other students choosing courses for the future.

Thank you.

Feedback for this course: Informatics 1: Data & Analysis
All surveys on MyEd: Course Enhancement Questionnaires
Reports from previous years: Student Course Feedback

Lecture 18: Hypothesis Testing and chi²

Title slide

Slides : Recording

Today’s lecture revisited the idea of correlation in data sets, and introduced the method of hypothesis testing for identifying whether features observed in samples in fact arise by chance.

For paired series of numerical data we can use the correlation coefficient, and for qualitative data the χ2 statistic. The lecture included examples of this applied to last year’s Inf1-DA exam results, bigram frequency in the British National Corpus, and possible gender bias in student admissions to Berkeley in 1973.
Continue reading Lecture 18: Hypothesis Testing and chi²