Expected Value

Expected Value๋ž€, ์šฐ๋ฆฌ๊ฐ€ ์‹คํ—˜์„ ์—ฌ๋Ÿฌ๋ฒˆ ๋ฐ˜๋ณตํ–ˆ์„ ๋•Œ, ๊ด€์ธก๋  ๊ฒฐ๊ณผ์˜ ํ‰๊ท ์œผ๋กœ ์˜ˆ์ธกํ•˜๋Š” ๊ฐ’ ์ž…๋‹ˆ๋‹ค.์—ฌ๊ธฐ์„œ ์‹คํ—˜(experiment)์˜ ์ •ํ™•ํ•œ ์ •์˜๋ฅผ ์•Œ๊ณ  ๊ฐ€์•ผ๊ฒ ์ฃ ? ๊ฐ€๋ น ์šฐ๋ฆฌ๊ฐ€ ๋™์ „์„ ๋˜์ ธ์„œ ์•ž๋ฉด์ด ๋‚˜์˜ฌ ํ™•๋ฅ ์ธ P(A)๋ฅผ ๋ชจ๋ฅธ๋‹ค๊ณ  ๊ฐ€์ •ํ•ด๋ด…์‹œ๋‹ค.๊ทธ๋ž˜์„œ ์šฐ๋ฆฌ๋Š” ์ฝ”์ธ ํ† ์Šค๋ฅผ ๋งŽ์ด ๋ฐ˜๋ณตํ•ด์„œ ๋‚˜์˜จ ๊ฒฐ๊ณผ๋ฅผ ๊ด€์ฐฐํ•ด์„œ, ์ด ๊ฐ’์˜ ํ‰๊ท ์„ ๋‚ผ ๊ฒƒ ์ž…๋‹ˆ๋‹ค.ํ•œ๋ฒˆ ๋˜์ ธ์„œ ๊ฒฐ๊ณผ๋ฅผ ๊ด€์ธกํ•˜๋Š”, ์ด ํ•œ๋ฒˆ์˜ ํ–‰์œ„๋ฅผ ์šฐ๋ฆฌ๋Š” ์‹œ๋„(trial)์ด๋ผ๊ณ  ๋ถ€๋ฆ…๋‹ˆ๋‹ค.๊ทธ๋ฆฌ๊ณ  ์ด ์‹œ๋„๋“ค์ด ์—ฌ๋Ÿฌ๋ฒˆ ๋ฐ˜๋ณต๋˜๋Š” ๊ณผ์ •์„ ์‹คํ—˜์œผ๋กœ ์ •์˜ํ•ฉ๋‹ˆ๋‹ค.  ์˜ˆ๋ฅผ ๋“ค์–ด ์šฐ๋ฆฌ๊ฐ€ 20๋ฒˆ ๋™์ „์„ ๋˜์ ธ์„œ ๊ด€์ฐฐํ•œ๋‹ค๊ณ  ํ–ˆ์„ ๋•Œ,์ด๋Š” '20๋ฒˆ์˜ ๊ฐœ๋ณ„์ ์ธ ์‹œ๋„๊ฐ€ ์žˆ๋Š” 1๋ฒˆ์˜ ์‹คํ—˜' ์ž…๋‹ˆ๋‹ค.  Experimental Probabilities | Theoretical Probabil..
Chan Lee
'Expected Value' ํƒœ๊ทธ์˜ ๊ธ€ ๋ชฉ๋ก