Mean
Table of contents
<
1. Definitions
>
2. Why is the mean useful?
3. Example
Definition - Key Words
Summarize information
Central tendency
Better data description
Definition
2 types of mean
Weighted mean
Arithmetic mean
Why is the mean useful?
Life expectancy
Exam notes
Number of children per woman
Amount of waste per inhabitant
Restaurant/hotel ratings
GDP per inhabitant
Example
(19 x 16 + 20 x 5 + 21 x 2 + 22 x 0 + 23 x 1)
= 19.5
24
Conclusion
Very useful in everyday life
It's important to know how to calculate it!
Sources
https://www.insee.fr/fr/metadonnees/definition/c1970#:~:text=La%20moyenne%20est%20l%27indicateur,sans%20connaître%20toute%20la%20distribution
https://www.lelivrescolaire.fr/page/6214716#:~:text=Comprendre&text=Une%20moyenne%20simple%20est%20le,et%20la%20somme%20des%20coefficients.&text=Moyenne%20simple%3Dnombre%20de%20valeurs,%2Bvaleur2%2B...
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Thanks for listening!
Marielle Delandre Anaïs Poisson Claire Desnouailles Evie Guerin