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Á¦ºñ»Ì±â, n °³ÀÇ Á¦ºñ Áß r °³°¡ ´ç÷ Á¦ºñ ÀÌ°í A, B °¡ ¼ø¼­´ë·Î »ÌÀ» ¶§ B ÀÇ ´ç÷ È®·ü

ÀÛ¼ºÀÚ Uploader : onmyway ÀÛ¼ºÀÏ Upload Date: 2019-08-17º¯°æÀÏ Update Date: 2019-08-17Á¶È¸¼ö View : 1267

n °³ÀÇ Á¦ºñ Áß r °³°¡ ´ç÷ Á¦ºñ ÀÌ°í A, B °¡ ¼ø¼­´ë·Î »ÌÀ» ¶§ B ÀÇ ´ç÷ È®·üÀ» ±¸ÇÑ´Ù.

A °¡ ´ç÷ Á¦ºñ¸¦ »ÌÀ» È®·üÀº r/n ÀÌ µÈ´Ù.

B ÀÇ ´ç÷ È®·üÀº A °¡ ´ç÷ Á¦ºñ¸¦ »Ì¾ÒÀ» °æ¿ì¿Í ±×·¸Áö ¾ÊÀº °æ¿ì·Î ³ª´©¾î Áø´Ù.

¨ç A °¡ ´ç÷ Á¦ºñ¸¦ »ÌÀº °æ¿ì, B °¡ ´ç÷ Á¦ºñ¸¦ »ÌÀ» È®·ü

P¨ç = r/n * (r-1)/(n-1) = r*(r-1)/(n*(n-1))

¨è A °¡ ´ç÷ Á¦ºñ¸¦ »ÌÁö ¸øÇÑ °æ¿ì, B °¡ ´ç÷ Á¦ºñ¸¦ »ÌÀ» È®·ü

P¨è = (n-r)/n * r/(n-1) = r*(n-r)/(n*(n-1))

B °¡ ´ç÷ Á¦ºñ¸¦ »ÌÀ» È®·ü P = P¨ç + P¨è À̹ǷÎ,

P = (r^2 - r + n*r - r^2)/(n*(n-1)) = r*(n-1)/(n*(n-1)) = r/n

µû¶ó¼­, A ¿Í B ÀÇ ´ç÷ È®·üÀº µ¿ÀÏ ÇÏ´Ù.

*** Âü°í¹®Çå[References] ***

P = r/n
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