डेटा मापन का कौन सा स्तर/पैमाना तब सबसे उपयुक्त होता है जब श्रेणियों का क्रम या पदक्रम (rank) महत्वपूर्ण होता है, लेकिन मानों के बीच सटीक संख्यात्मक अंतर नहीं मापा जाता?

The 'Drain of Wealth' theory was propounded by which Indian nationalist leader?

Which event is considered the turning point in Mahatma Gandhi's leadership in the Indian independence movement?

Which African leader is known for his non-violent opposition to colonial rule?