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मई, 2026 की पोस्ट दिखाई जा रही हैं

Standard Deviation in Hindi | Formula, Tricks, MCQs & Easy Notes

  Standard Deviation (मानक विचलन) + आसान Tricks 1. Introduction Statistics में Standard Deviation एक बहुत महत्वपूर्ण topic है। यह बताता है कि data अपने Mean (औसत) से कितना फैला हुआ है। SD कम → Data पास-पास है SD ज्यादा → Data ज्यादा फैला हुआ है Example: 50, 51, 49, 50 → SD कम 10, 90, 30, 70 → SD ज्यादा 2. Definition Standard Deviation वह measure है जो data values की Mean से दूरी को बताता है।  Join now and grow your LIS career: https://whatsapp.com/channel/0029Va9qf8JGzzKJbG1NMB3T   Formula σ = √[ Σ(x - x̄)² / N ] Where: x = प्रत्येक value x̄ = Mean N = Total observations 3. Features / Types Features Data dispersion बताता है Mean पर आधारित होता है हमेशा positive होता है Accurate statistical measure माना जाता है Types Type Meaning Population Standard Deviation पूरे data के लिए Sample Standard Deviation Sample data के लिए s = √[ Σ(x - x̄)² / (n - 1) ] Easy Tricks Trick 1: SD याद रखने क...
  📚 Koha Library Management System – Complete Guide 1. Introduction In the digital era, libraries are shifting from manual to automated systems. Koha is one of the most widely used open-source Integrated Library Management Systems (ILMS). 2. Definition Koha is an open-source Integrated Library System used to automate library operations like cataloguing, circulation, acquisition, and OPAC. 3. Features / Modules Cataloguing: MARC21 based records Circulation: Issue/Return, fines, members OPAC: Online search system Acquisition: Vendor & budget management Serial Control: Journal tracking Reports: Data reports Administration: User roles 4. Advantages Free & Open Source Highly Customizable Web-based Access User-Friendly Strong Community Support 5. Comparison Table Feature Koha Proprietary Cost Free Paid Customization High Limited Support Community Vendor 6. MCQs 1. Koha is: A) Proprietary B) Open Source C) Hardware D)...