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Data Analysis Tutorials
Get insights on the latest tools & methods that you can use to analyze your data more effectively. Our data analysis tutorials will help you develop your skills.
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Least Squares Method: How to Find the Best Fit Line
Use this method to make better predictions from real-world data. Learn how to minimize errors and find the most reliable trend line.
Amberle McKee
June 12, 2025
The T-Distribution: A Key Tool for Small Sample Inference
Understand how the t-distribution helps when sample sizes are small or population variance is unknown. Compare it to the normal and Z-distributions to learn when each is appropriate.
Vidhi Chugh
June 11, 2025
PI() in Excel: How to Use and Apply π in Your Formulas
Learn how to use PI() in Excel so you have precision with mathematical formulas. Discover examples, syntax details, and tips for harnessing π in calculations.
Josef Waples
June 11, 2025
Excel Time Formulas: Calculate, Format, and Manipulate Time in Excel
Master Excel time formulas to calculate durations, handle time over 24 hours, and format time values for clear, accurate reporting.
Samuel Shaibu
June 5, 2025
Law of Large Numbers: A Key to Understanding Uncertainty
Understand how the law of large numbers supports statistical reasoning. See how it ensures consistency in averages over time and powers predictions in fields like sports, finance, and science.
Laiba Siddiqui
June 5, 2025
Introduction to the WHERE Clause in SQL
In this tutorial, you will be introduced to filtering rows in SQL using the WHERE clause.
Sayak Paul
May 29, 2025
Triangle Inequality: From Geometry to Machine Learning
The triangle inequality is more than just a geometric principle - it's a cornerstone of distance measures in data science. Discover how this elegant mathematical concept powers algorithms across computational geometry, optimization, and machine learning.
Vinod Chugani
May 27, 2025
R-Squared Explained: How Well Does Your Regression Model Fit?
Learn what R-squared means in regression analysis, how to calculate it, and when to use it to evaluate model performance. Compare it to related metrics with examples in R and Python.
Elena Kosourova
May 14, 2025
Mastering COUNTIF() in Power BI: A DAX-Based Approach
Power BI users from Excel always find out that Power BI does not have a native COUNTIF() function. This article will show various ways to implement COUNTIF() in Power BI and its practical use cases.
Adejumo Ridwan Suleiman
May 6, 2025
Time Series Decomposition: Understand Trends, Seasonality, and Noise
Learn how to break down time series data into meaningful components like trend, seasonality, and residuals using additive and multiplicative models. Learn about both classical and STL methods. Explore seasonal adjustments and practice forecasting with decomposition models.
Josef Waples
Laiba Siddiqui
April 30, 2025
Hierarchical Clustering: Concept Overview With Examples
Understand the basic concepts of hierarchical clustering, how it works, and how to implement it in Python.
Austin Chia
April 27, 2025
Remove Blank Rows in Excel: 4 Easy Methods
Learn how to remove extra rows quickly using sorting, formulas, and VBA, depending on what works best for you.
Laiba Siddiqui
April 26, 2025