Episode 11 | Finding Structure in Multivariate Data

Episode 11 | Finding Structure in Multivariate Data

This episode is about what to do when your data has many variables at once. We start with the basic idea of how variables “move together” (correlation and covariance), and why that matters for understanding patterns in real datasets.

Then we introduce dimension reduction—ways to compress lots of information into a few summary features, so you can see the main structure without getting lost in details. We explain how these methods find the directions where the data varies most, and how a simple “rotation” can make the results easier to interpret.

We wrap up with practical rules of thumb for deciding how many components to keep, and a quick preview of how these ideas connect to grouping similar observations and classifying new cases.

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Avsnitt(13)

Episode 13 | Survival Analysis: Making Sense of Time-to-Event Data

Episode 13 | Survival Analysis: Making Sense of Time-to-Event Data

In this episode, we introduce the core ideas behind analyzing time-to-event data—situations where the outcome isn’t just “what happened,” but when it happened. A key challenge is that some participant...

3 Feb 41min

Episode 12 | Clustering and Classification: Finding Structure in Data

Episode 12 | Clustering and Classification: Finding Structure in Data

In this episode, we step into multivariate thinking and ask a practical question: when do data points naturally form “groups,” and how can we use those groups to make decisions?We walk through how gro...

3 Feb 38min

Episode 10 | From Chi-Square to GLMs: Beyond Linear Regression

Episode 10 | From Chi-Square to GLMs: Beyond Linear Regression

This episode is about working with categorical outcomes—questions where results fall into categories rather than a numeric scale. We learn how to check whether two variables are related, how to model ...

2 Feb 36min

Episode 9 | Categorical Data in Practice: Measures of Association, and Simpson’s Paradox

Episode 9 | Categorical Data in Practice: Measures of Association, and Simpson’s Paradox

In this episode, we start with Fisher’s “Lady Tasting Tea”—a classic reminder that good questions need good experimental design. Then we shift from continuous outcomes to categorical data: how a simpl...

2 Feb 41min

Episode 8 | Two-Way ANOVA and Beyond

Episode 8 | Two-Way ANOVA and Beyond

This episode moves from one-way ANOVA to two-factor randomized experiments, focusing on how to test main effects and, more importantly, interactions—when the effect of one factor depends on the level ...

1 Feb 36min

Episode 7 | Design of Experiments

Episode 7 | Design of Experiments

This episode introduces the core logic of experimental design and ANOVA: what we mean by causality, factors, and confounders—and why randomization, replication, and blocking are the practical tools th...

1 Feb 31min

Episode 6 | Model Selection Strategies

Episode 6 | Model Selection Strategies

Episode 6 is about making multiple regression work in real life: how to choose predictors without overfitting, when to transform variables to fix messy variance or nonlinearity, and what to do when pr...

1 Feb 37min

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