๐Ÿ“ˆ ์ˆ˜ํ•™

Chebyshev's Inequality๋Š” ํ†ต๊ณ„์—์„œ ์ค‘์š”ํ•˜๊ฒŒ ๋‹ค๋ฃจ์–ด์ง€๋Š” ๋ถ€๋“ฑ์‹์ด๋‹ค. ๋ชจ๋“  ๋ถ„ํฌ(Distribution)์— ์ ์šฉ์ด ๋˜๋ฉฐ, ์ด์‚ฐ์ ์ด๋“ (discrete) ์—ฐ์†์ ์ด๋“ (continuous) ์ฆ๋ช…์ด ๊ฐ€๋Šฅํ•˜๋‹ค. ํŠน์ •ํ•œ ์‚ฌ์ „์ด ์ผ์–ด๋‚˜๋Š” ํšŸ์ˆ˜์ธ ํ™•๋ฅ  ๋ณ€์ˆ˜ X์— ๋Œ€ํ•ด |X-ษฅ|≥kσ ๋˜๋Š” |X-ษฅ|โ‰บkσ ๋ฒ”์œ„์˜ ํ™•๋ฅ  ๊ฐ’์˜ ์ตœ๋Œ€ ๋˜๋Š” ์ตœ์†Ÿ๊ฐ’์„ ์•Œ ์ˆ˜ ์žˆ๋‹ค. Chebyshev's Inequality ์™ธ์—๋„ ๋” ์ •ํ™•ํ•˜๊ฒŒ ํ™•๋ฅ ๊ฐ’์„ ๊ทผ์‚ฌํ•  ์ˆ˜ ์žˆ๋Š” ์ ˆ๋Œ€ ๋ถ€๋“ฑ์‹(ํ•ญ์ƒ ์ฐธ์ด ๋˜๋Š” ๋ถ€๋“ฑ์‹)๋“ค์ด ์กด์žฌํ•œ๋‹ค.
ํ™•๋ฅ ๊ณผ ํ†ต๊ณ„ ์ฒซ ์‹œ๊ฐ„์ด๋ผ ๊ต์ˆ˜๋‹˜๊ป˜์„œ statistical article์„ ์ฐพ์•„์˜ค๋Š” ๊ฐ€๋ฒผ์šด ๊ณผ์ œ๋ฅผ ์ฃผ์…จ๋‹ค. 1. Recap ์ˆ˜์—… ๋‚ด์—์„œ ํ†ต๊ณ„์  ์„ ํฌ(proexclaim) ๋˜๋Š” statement์— ๋Œ€ํ•ด, ์—ฌ๋Ÿฌ ์‚ฌ๋ก€๋ฅผ ๊ฐ€์ง€๊ณ , ์•„๋ž˜์˜ ๋„ค ๊ฐ€์ง€ ์กฐ๊ฑด์— ๋ถ€ํ•ฉํ•˜๋Š”์ง€ ํŒ๋‹จํ•ด๋ณด์•˜๋‹ค. 1. ์˜ฌ๋ฐ”๋ฅธ ์งˆ๋ฌธ์ธ์ง€ (right question) 2. ๋ฏฟ์„ ๋งŒํ•œ ์ถœ์ฒ˜์˜ ํ†ต๊ณ„ ์ž๋ฃŒ์ธ์ง€ (reliable source) 3. ํ‘œ๋ณธ(sample)์ด ๋ชจ์ง‘๋‹จ์„ ์ž˜ ๋ฐ˜์˜ํ•˜๋Š”์ง€ (reflect) 4. ํ†ต๊ณ„ ์ž๋ฃŒ๋ฅผ ๊ธฐ๋ฐ˜์œผ๋กœ ์˜ฌ๋ฐ”๋ฅธ ๊ฒฐ๋ก ์„ ๋‚ด๋ ธ๋Š”์ง€ (appropriate conclusion) ๊ทธ ์ค‘ ํ•œ ๊ฐ€์ง€ ๋ฌธ์ œ๋Š” ๋ฏธ๊ตญ์˜ ๊ณตํ™”๋‹น(Republican)๊ณผ ๋ฏผ์ฃผ๋‹น(Democrat)์˜ ์ง€์ง€์œจ์„ ์กฐ์‚ฌํ•  ๋•Œ ์–ด๋–ป๊ฒŒ ํ‘œ๋ณธ์„ ์ถ”์ถœํ•  ๊ฒƒ(sampling)์ธ์ง€ ์ •ํ•˜..
๐Ÿซ™ ๋ฌธ์ œ ์ถœ์ฒ˜ ํ”„๋ฆฌ๋“œ๋ฒ„๊ทธ ์„ ํ˜•๋Œ€์ˆ˜ํ•™ 5ํŒ ๐Ÿถ ์‚ฌ์šฉ ๊ฐœ๋… #vector sum #equations of lines ๐ŸŒฟ ํ’€์ด ์„ค๋ช… ๋‘ ๋Œ€๊ฐ์„ ์„ ๋ฒกํ„ฐ๋กœ ๋‚˜ํƒ€๋‚ด๊ณ , ์ด๋“ค์„ ์ด๋“ฑ๋ถ„ํ–ˆ์„ ๋•Œ ์ข…์ ์ด ๊ฐ™์Œ์„ ๋ณด์ธ๋‹ค. ์ฒซ ๋ฒˆ์งธ ํ’€์ด๋Š”, ํ‰ํ–‰์‚ฌ๋ณ€ํ˜•์˜ ์ ์„ ๋ฌธ์ž๋กœ ๋†“๊ณ  ์ด๊ฒƒ์œผ๋กœ ๋ฒกํ„ฐ๋ฅผ ๋‚˜ํƒ€๋‚ด์–ด ์ฆ๋ช…ํ•˜์˜€๋‹ค. ๋‘ ๋ฒˆ์งธ ํ’€์ด๋Š”, ํ‰ํ–‰์‚ฌ๋ณ€ํ˜•์˜ ๋‘ ์ ์„ ์ง€๋‚˜๋Š” ์ง์„ ์„ ๋ฌธ์ž๋กœ ๋†“๊ณ  ์ด๋ฅผ ์‚ฌ์šฉํ•˜์—ฌ ์ฆ๋ช…ํ•˜์˜€๋‹ค.
inthree3
'๐Ÿ“ˆ ์ˆ˜ํ•™' ์นดํ…Œ๊ณ ๋ฆฌ์˜ ๊ธ€ ๋ชฉ๋ก