π DAY 15/200 β Variance & Standard Deviation π
Do datasets ka average same ho sakta haiβ¦ but unka behavior completely different! π²
Welcome to Day 15 of the 200 Days Data Analysis & Data Science Journey!
Mean hume average batata hai, but data kitna spread out hai, ye samajhne ke liye Variance & Standard Deviation important hain.
π 1οΈβ£ Variance
Variance measures how spread out data points are from the mean.
πΉ Low Variance β Values close together
πΉ High Variance β Values more spread out
π 2οΈβ£ Standard Deviation
Standard Deviation = βVariance
Ye batata hai ki data points generally mean se kitna deviate kar rahe hain.
π Simple Example:
Dataset A:
48, 50, 52
Dataset B:
20, 50, 80
β‘οΈ Dono ka Mean = 50
But Dataset B ka spread much higher hai! π²
π‘ Mean alone is NOT enough.
Always understand the spread of your data.
π₯ Used in:
π Data Analysis
π€ Machine Learning
π Risk Analysis
π§ͺ Statistics
π Day 16: Normal Distribution π
π Follow @tech_jroshan for the complete 200 Days Data Analysis & Data Science Journey!
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200D
aysChallenge #Day15
Dive into the core concepts of variance and standard deviation in this quick #Short video! π Un
derstand how these fundamental #Statistics measure
s help us quantify the spread and variability within datasets. Essential for #DataAnalytics, #Ma
chineLearning (#
ML), and any field
dealing with #Data. Learn what v
ariance and standard deviation tell you about your data in minutes!