Descriptive Statistics 101

Critical Concepts for Data Science

Histogram emoji

Table of content:

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Let´s start

Introduction:

Measures of Central Tendency:

1. Mean:

Mean calculation example
Mean calculation example
Simple, right?

2. Median:

Median calcultation examples
Median calcultation examples
Ever and Odd case

3. Mode:

Unimodal data set example
Unimodal data set example
Unimodal example

Measures of Dispersion (or Variability):

1. Range:

Range pseudo formula
Range pseudo formula

2. Interquartile Range (IQR) and other percentiles:

Interquartile Range Area
Interquartile Range Area
IQR= Q3-Q1

3. Mean Absolute Deviation (MAD):

Mean Absolute Deviation formula
Mean Absolute Deviation formula
Almost there

4. Variance:

Almost as MAD, but absolutely less crazy

5. Standard Deviation:

Which is the best — Range, IQR, or standard deviation?

Key Concepts for distributions:

Modality:

Types of Modality in a distribution
Types of Modality in a distribution

Skewness:

Types of skewness in a distribution
Types of skewness in a distribution
Types of skewness

Kurtosis:

Kurtosis Formula
Kurtosis Formula
Kurtosis :)
Types of kurtosis
Types of kurtosis

Summary

Hi, I´m Manuel 👋 you may know me as @vazzmanu

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