Lecture 2 (Practice)

16 Setembro 2026, 11:00 • Yiu Lim LUI

We reviewed the core concepts and completed exercises 1.9, 1.10, and 2.1 (a, b, and c). We also explored common databases.

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Lecture 2

15 Setembro 2026, 09:30 • Yiu Lim LUI

·  Descriptive Statistics Overview: Descriptive statistics focuses on presenting data using tables and graphs, and summarizing data using measures like the sample mean.

·  Categorical Data Representation: Categorical variables are typically summarized using frequency distribution tables, crosstabs, bar charts, and pie charts, while avoiding misleading 3D graphical representations.

·  Numerical Data Representation: Numerical variables use frequency distributions, cumulative distributions, and visual tools such as histograms, stem-and-leaf displays, and boxplots.

·  Histogram Construction Rules: Building histograms requires defining the number of classes using rules like Sturges' rule or the square root rule, calculating class width, and plotting contiguous bars without gaps to represent data density.

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Lecture 1 (Practice)

9 Setembro 2026, 11:00 • Yiu Lim LUI

Some concepts were reviewed, and exercises 1.1 through 1.6 have been completed.

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Lecture 1

8 Setembro 2026, 09:30 • Yiu Lim LUI

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