Statistics Correction Trick in 59 Seconds! 🔥 | JEE Maths
❓ Concept 🎬 Statistics Correction Trick in 59 Sec Kabhi data entry mein galti ho jaaye — ek value galat feed ho jaaye — toh mean bhi wrong nikalta hai aur standard deviation bhi ! Good news? 👉 Dono ko correct karna ek simple logical trick se possible hai. 🖼️ Concept Image ✍️ Short Explanation Statistics mein ek hi observation wrong ho toh poora dataset ke: ✔ Σx ✔ Σx² dono par effect padta hai — aur isi se mean & standard deviation change hote hain. 🔹 Step 1 — Why Correction Is Needed Agar one observation wrong hai : 👉 Wrong mean nikalta hai 👉 Wrong σ (standard deviation) nikalta hai Isliye pehle mean correct karte hain , phir σ ko recompute karte hain . 🔹 Step 2 — Correction in Mean (Fastest Formula 💡) Correct mean: Correct Mean = Wrong Mean + Correct Value − Wrong Value n Yahaan n = number of observations n = \text{number of observations} 📌 Matlab sirf difference / n add–subtract hota hai. Full recom...