Outlier Detection in Data: Data Analytics Guide (2026)

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📑 Table of Contents

What is Data Analytics?

1 Introduction to Data Analytics
2 History and Evolution of Data Analytics
3 Why Businesses Use Data Analytics
4 Key Components of Data Analytics
5 Examples of Data Analytics in Business
6 Data Analytics vs Data Science
7 Skills Required for Data Analysts
8 Common Tools Used in Data Analytics
9 Challenges in Data Analytics
10 Future of Data Analytics

Types of Data & Data Sources

11 Understanding Different Types of Data
12 Structured Data Explained
13 Unstructured Data Explained
14 Semi Structured Data
15 Internal Data Sources
16 External Data Sources
17 Primary and Secondary Data
18 Big Data Sources
19 Open Data Sources for Analytics
20 Choosing the Right Data Source

Introduction to Excel for Analytics

21 Introduction to Microsoft Excel for Data Analytics
22 Understanding the Excel Interface
23 Understanding Rows, Columns and Cells
24 Entering and Formatting Data in Excel
25 Basic Excel Formulas for Analytics
26 Sorting and Filtering Data in Excel
27 Using Excel Functions for Data Analysis
28 Creating Charts in Excel
29 Introduction to Pivot Tables
30 Excel Dashboards for Beginners

Basic Statistics for Beginners

31 Introduction to Statistics for Data Analytics
32 Understanding Mean Median and Mode
33 Understanding Variance and Standard Deviation
34 Understanding Probability Basics
35 Understanding Data Distribution
36 Understanding Correlation
37 Understanding Outliers in Data
38 Understanding Sampling
39 Descriptive vs Inferential Statistics
40 Statistics in Real World Data Analytics

Introduction to Data Visualization

41 Introduction to Data Visualization
42 Why Data Visualization is Important
43 Types of Data Visualizations
44 Bar Charts Explained
45 Line Charts Explained
46 Pie Charts Explained
47 Scatter Plots and Relationship Analysis
48 Choosing the Right Chart
49 Principles of Good Data Visualization
50 Introduction to Dashboards

Understanding Business KPIs

51 Introduction to Business KPIs
52 Types of Business KPIs
53 Financial KPIs Explained
54 Sales KPIs Explained
55 Marketing KPIs Explained
56 Operational KPIs Explained
57 Leading vs Lagging KPIs
58 How to Define Effective KPIs
59 KPI Dashboards Explained
60 Best Practices for KPI Tracking

Introduction to SQL & Databases

61 Introduction to Databases
62 What is SQL
63 Understanding Database Tables
64 SQL SELECT Statement
65 SQL WHERE Clause
66 SQL ORDER BY Clause
67 SQL GROUP BY Clause
68 SQL JOIN Basics
69 SQL Aggregation Functions
70 SQL in Real World Data Analytics

Introduction to Python for Data Analytics

71 Introduction to Python for Data Analytics
72 Installing Python for Data Analytics
73 Understanding Python Data Types
74 Working with Python Lists
75 Introduction to NumPy
76 Introduction to Pandas
77 Reading Data from Files using Python
78 Data Cleaning with Python
79 Data Visualization with Python
80 Python in Real World Data Analytics

Data Cleaning Fundamentals

81 Introduction to Data Cleaning
82 Common Data Quality Issues
83 Handling Missing Data
84 Removing Duplicate Records
85 Fixing Data Formatting Issues
86 Outlier Detection in Data
87 Data Transformation Basics
88 Standardizing Data Values
89 Data Validation Techniques
90 Best Practices for Data Cleaning

Analytical Thinking & Problem Solving

91 Introduction to Analytical Thinking
92 Understanding Problem Solving in Analytics
93 Data Driven Decision Making
94 Understanding Root Cause Analysis
95 Breaking Down Complex Problems
96 Using Hypothesis in Data Analysis
97 Critical Thinking for Analysts
98 Using Data to Identify Patterns
99 Structured Thinking Frameworks
100 Real World Analytical Thinking Examples

Real-World Analytics Case Studies (Beginner)

101 Introduction to Analytics Case Studies
102 Sales Analytics Case Study
103 Marketing Campaign Case Study
104 Customer Retention Case Study
105 Retail Store Performance Case Study
106 Inventory Management Case Study
107 Website Traffic Analysis Case Study
108 Employee Performance Analytics Case Study
109 Profitability Analysis Case Study
110 How to Approach Beginner Analytics Case Studies

Career Paths in Data Analytics

111 Introduction to Careers in Data Analytics
112 Who is a Data Analyst
113 Business Analyst Career Path
114 Data Scientist vs Data Analyst
115 Skills Required for Data Analytics Careers
116 Tools Used by Data Analysts
117 Entry Level Data Analytics Jobs
118 Certifications for Data Analytics
119 Building a Data Analytics Portfolio
120 Future of Data Analytics Careers

Building Your First Analytics Project

121 Introduction to Analytics Projects
122 Choosing the Right Dataset
123 Defining the Project Problem
124 Collecting and Importing Data
125 Cleaning the Dataset
126 Exploring Data and Finding Patterns
127 Creating Charts and Visualizations
128 Building a Simple Dashboard
129 Interpreting Results and Insights
130 Presenting Your Analytics Project

Tools Overview & Learning Roadmap

131 Introduction to Data Analytics Tools
132 Microsoft Excel for Data Analysis
133 SQL for Data Retrieval
134 Python for Data Analytics
135 Tableau for Data Visualization
136 Power BI for Business Analytics
137 Comparing Analytics Tools
138 Learning Roadmap for Data Analytics
139 Free Resources to Learn Data Analytics
140 How to Become a Data Analyst

Beginner Interview Preparation

141 Introduction to Data Analytics Interviews
142 Common Data Analytics Interview Questions
143 Excel Interview Questions for Analysts
144 SQL Interview Questions for Beginners
145 Statistics Interview Questions
146 Data Visualization Interview Questions
147 Case Study Interview Questions
148 Behavioral Interview Questions
149 Tips for Cracking Analytics Interviews
150 Final Interview Preparation Checklist

Outlier Detection in Data

Beginner Topic 6 of 10

Outlier Detection

Outliers are data points that differ significantly from other observations.

Examples

Extremely high sales values
Incorrect measurements

Outliers can distort analysis and must be handled carefully.

Fixing Data Formatting Issues Data Transformation Basics

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