08. Variance, écart-type et coefficient de variation

FNEGE-certified channel. Detailed presentation of the two main indicators of dispersion: variance and standard deviation. I explain how to calculate and interpret them. A short section of the video explains the principle of variance decomposition. Finally, we'll quickly look at the coefficient of variation. 0:00 Introduction 0:33 Principle of variance and standard deviation 8:14 Formulas for variance and standard deviation (grouped data) 10:23 Application exercise: calculating variance (grouped data) 16:16 Intra- and inter-population variance decomposition 20:35 Application exercise: variance decomposition 28:16 The coefficient of variation 29:46 Conclusion This video is intended for first-year undergraduate students at the Sorbonne School of Management (Paris 1 Panthéon-Sorbonne University), but if it's useful to others, welcome! ===== FOR TEACHERS ===== Want to use my videos in your classes? Great! Here's a short teaching guide to download to give you ideas and make it easier to learn the content: https://drive.google.com/file/d/18TPa...