Correlation
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What are independent and dependent variables? What is coefficient of correlation and how is it calculated? Illustrate with formula and range of values (r). (UPSC 2021, 15 Marks, )
स्वतंत्र और आश्रित चर क्या हैं? सहसंबंध गुणांक क्या है और इसे कैसे गणना की जाती है? सूत्र और मानों की सीमा (r) के साथ उदाहरण दें। (What are independent and dependent variables? What is coefficient of correlation and how is it calculated? Illustrate with formula and range of values (r).)Answer
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What is correlation? Give its types. Briefly explain the various methods of calculation of correlation between X and Y variables. (UPSC 2019, 10 Marks, )
सहसंबंध क्या है? इसके प्रकार बताएं। X और Y चर के बीच सहसंबंध की गणना की विभिन्न विधियों को संक्षेप में समझाएं। (What is correlation? Give its types. Briefly explain the various methods of calculation of correlation between X and Y variables.)Answer
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What is correlation? Explain its various types and methods of calculating correlation analysis. (UPSC 2016, 10 Marks, )
सहसंबंध क्या है? इसके विभिन्न प्रकार और सहसंबंध विश्लेषण की गणना की विधियों को समझाइए। (What is correlation? Explain its various types and methods of calculating correlation analysis.)Answer
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What is correlation? Explain its various types and methods of calculating correlation analysis. (UPSC 2016, 10 Marks, )
सहसंबंध क्या है? इसके विभिन्न प्रकार और सहसंबंध विश्लेषण की गणना की विधियों को समझाइए। (What is correlation? Explain its various types and methods of calculating correlation analysis.)Answer
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What is "Correlation"? Citing suitable examples, describe the type and degree of correlation and mathematical estimation of `r' between the bivariates. (UPSC 2008, 30 Marks, )
"सहसंबंध क्या है?" उपयुक्त उदाहरण देते हुए, द्विवैरीय के बीच सहसंबंध के प्रकार और डिग्री और 'r' के गणितीय अनुमान का वर्णन करें। (What is "Correlation"? Citing suitable examples, describe the type and degree of correlation and mathematical estimation of 'r' between the bivariates.)Enroll Now
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Differentiate between correlation and regression. Discuss the methods used to study correlation. Add a note on the coefficient of correlation. (UPSC 2005, 30 Marks, )
सहसंबंध और प्रतिगमन के बीच अंतर करें। सहसंबंध का अध्ययन करने के लिए उपयोग की जाने वाली विधियों पर चर्चा करें। सहसंबंध गुणांक पर एक टिप्पणी जोड़ें। (Differentiate between correlation and regression. Discuss the methods used to study correlation. Add a note on the coefficient of correlation.)Enroll Now
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Define statistical correlation and regression. Deduce formulae for correlation coefficient and regression equations for two variables, X and Y. Write down the formulae for t-test in the above cases. Prove that the correlation coefficient lies between 1 and +1. (UPSC 2001, 60 Marks, )
सांख्यिकीय सहसंबंध और प्रतिगमन को परिभाषित करें। दो चर, X और Y के लिए सहसंबंध गुणांक और प्रतिगमन समीकरणों के सूत्र निकालें। उपरोक्त मामलों में t-परीक्षण के लिए सूत्र लिखें। यह सिद्ध करें कि सहसंबंध गुणांक -1 और +1 के बीच होता है। (Define statistical correlation and regression. Deduce formulae for correlation coefficient and regression equations for two variables, X and Y. Write down the formulae for t-test in the above cases. Prove that the correlation coefficient lies between -1 and +1.)Enroll Now