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Regression Analysis

Regression analysis ek statistical method hai jo data me variables ke beech ka mathematical…

Overview

Regression Analysis — Quick Facts

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Property: Detail

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Topic: Regression Analysis

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Type: Statistical Method / Machine…

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Definition: Method that finds mathematical…

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Infobox

📚 | Property | Detail | |---|---| | Topic | Regression Analysis | | Type | Statistical…

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Why Regression Analysis Matters

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Future predict karna — historical…

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House price: 1200 sq ft, 3 rooms,…

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Sales: ₹5 lakh ad spend → model…

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Data-driven decision making — gut…

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Key Concepts

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Dependent variable (Y): Output —…

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Independent variable (X): Input —…

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Convention: Y = target / response…

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Ek regression me 1 dependent…

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Simple Linear Regression

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One input (X), one output (Y) —…

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m = slope (coefficient), b =…

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Goal: Training data se m aur b ki…

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Data: 10 students ke study hours…

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Multiple Linear Regression

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Multiple independent variables…

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$b_0$ = intercept, $b_1, b_2, ...,…

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Simple linear regression ka…

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Inputs: Area (sq ft), Number of…

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Types of Regression

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Linear: Relationship straight…

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Non-Linear (Polynomial, etc.):…

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Start with linear — agar linear…

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Problem: Multiple regression me…

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Polynomial Regression

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Data me curve hai — straight line…

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Degree 2 (Quadratic): Y = b₀ + b₁X…

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Degree 3 (Cubic): Y = b₀ + b₁X +…

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Higher degree = more flexible…

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Evaluating Regression Models

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Data ko training set (70-80%) aur…

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Train pe model sikhe, test pe…

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Kabhi bhi training data pe…

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Overfitting: Training pe…

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Assumptions of Linear Regression

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X aur Y ke beech linear (straight…

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Violation: Agar relationship curve…

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Check: Scatter plot banao —…

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Har data point independent hona…

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Real-World Applications

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Problem: Naya ghar kharidna/bechna…

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Features: Area, rooms, location,…

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Model: Multiple regression →…

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Used by: Zillow (Zestimate),…

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Best Practices

🎯 1. Assumptions check pehle karo — linear regression apply karne se pehle linearity,…

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Glossary

⭐ | # | Term | Meaning | |---|---|---| | 1 | Regression Analysis | Statistical method jo…

Diagram

Visual Flow

📊 Diagram visualization — details in narration

Quiz — Question 1

Regression Analysis ka sabse sahi definition kya hai?

Quick Quiz

Quiz — Question 2

Regression Analysis ka 'Topic' kya hai?

Complete! 🎉

Regression Analysis Complete!

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