Question
काई—वर्ग (χ2χ 2) परीक्षण (Chi square Test)
Answer :
Word Count : 538
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Skip in 10
काई-वर्ग (χ²) परीक्षण एक महत्वपूर्ण सांख्यिकीय परीक्षण है, जिसका उपयोग मुख्यतः दो या दो से अधिक श्रेणीबद्ध (Categorical) चरों के बीच संबंध, स्वतंत्रता तथा प्रेक्षित और अपेक्षित आवृत्तियों के बीच अंतर की जाँच करने के लिए किया जाता है। सार्वजनिक स्वास्थ्य और महामारी विज्ञान में इसका व्यापक प्रयोग रोग तथा जोखिम कारक, स्वास्थ्य व्यवहार तथा सामाजिक-जनसांख्यिकीय विशेषताओं के बीच संबंधों का अध्ययन करने में किया जाता है। काई-वर्ग परीक्षण का मूल सिद्धांत यह है कि यदि किसी परिकल्पना के अनुसार विभिन्न श्रेणियों में आवृत्तियों का कोई विशेष वितरण अपेक्षित है, तो वास्तविक रूप से प्राप्त आवृत्तियों की तुलना अपेक्षित आवृत्तियों से की जाती है। यदि दोनों में अंतर बहुत अधिक है, तो यह माना जा सकता है कि यह अंतर केवल संयोग के कारण
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