๋ฐ์ดํ„ฐ ๋ถ„์„/Today I learned :

[๋งˆ์ผ€ํŒ…์„ ์œ„ํ•œ ๋ฐ์ดํ„ฐ๋ถ„์„6] ๋””์ง€ํ„ธ ๊ด‘๊ณ ์˜ ์„ฑ๊ณผ ์ธก์ • ์ง€ํ‘œ

์ฃผ์˜ ๐Ÿฑ 2022. 12. 3. 17:48
728x90
๋ฐ˜์‘ํ˜•

๋””์ง€ํ„ธ ๊ด‘๊ณ ์˜ ์„ฑ๊ณผ ์ธก์ • ์ง€ํ‘œ๋Š” ํด๋ฆญ ์ˆ˜๊ฐ€ ์•„๋‹ˆ๋‹ค!

ํ”ํžˆ ๋””์ง€ํ„ธ ๊ด‘๊ณ ์˜ ์„ฑ๊ณผ ์ธก์ • ์ง€ํ‘œ๋Š” ์‹คํ—˜๊ณผ ๊ด€์ธก, ๋‘ ๋ฒ”์ฃผ๋กœ ๋‚˜๋‰œ๋‹ค. 

1. ์‹คํ—˜์  ๋ฐฉ๋ฒ•(experimental Methods)

- ์ž˜ ๊ณ„ํš๋œ ์‹คํ—˜์„ ํ†ตํ•ด ๊ด‘๊ณ  ์„ฑ๋Šฅ์„ ํ‰๊ฐ€ํ•˜๋Š” ๋ฐฉ๋ฒ•์ด์ž ๊ด‘๊ณ ํšจ๊ณผ๋ฅผ ํ‰๊ฐ€ํ•˜๋Š” ๊ฐ€์žฅ ์ข‹์€ ๋ฐฉ๋ฒ•

๊ฒ€์ • ๊ฐ€์„ค(test hypothesis)์€ ๋ฆฌ์„œ์น˜์—์„œ ์ž…์ฆํ•˜๊ณ  ์‹ถ์€ ๊ฒƒ์— ์ง‘์ค‘ํ•œ๋‹ค. ๊ท€๋ฌด๊ฐ€์„ค์„ ๊ธฐ๊ฐํ•˜๊ณ , ๋Œ€์•ˆ์„ ์ˆ˜์šฉํ•  ์ˆ˜ ์žˆ๋Š”์ง€ ์—ฌ๋ถ€๋ฅผ ๊ฒ€์ •ํ•˜๋Š” ๊ฒƒ์ด ๋ชฉ์ ์ด๋‹ค. ๊ฒ€์ • ๊ฐ€์„ค์€ ๊ฐ•๋ ฅํ•œ ๊ฐ€์„ค(strong hypothesis)์ด์–ด์•ผ ํ•œ๋‹ค. ๊ฐ•๋ ฅํ•œ ๊ฐ€์„ค์€ who(audience), what(behavior of audience), why, where, when์„ ํฌํ•จํ•˜๊ณ  ์žˆ๋Š” ๊ฐ€์„ค์ด๋‹ค. ์˜ˆ๋ฅผ ๋“ค๋ฉด, 35-44์„ธ ๋„ค๋œ๋ž€๋“œ์˜ ๋„์‹œ์—์„œ ์‚ด๊ณ  ์žˆ๋Š” ์—ฌ์„ฑ์€ ํฌ๋ฆฌ์Šค๋งˆ์Šค์— ํŽ˜์ด์Šค๋ถ์—์„œ ์ง„ํ–‰๋˜๋Š” ์šฐ๋ฆฌ ์บ ํŽ˜์ธ์— ๋†’์€ ์ „ํ™˜์œจ์„ ๋ณด์ผ ๊ฒƒ์ด๋‹ค, ์™œ๋ƒํ•˜๋ฉด ์šฐ๋ฆฌ ์บ ํŽ˜์ธ์˜ ํ•ต์‹ฌ์ธ ๊ฝƒ ๋ฐฐ๋‹ฌ์ด ๊ทธ ๊ทธ๋ฃน์— ์–ดํ•„์ด ๋  ๊ฒƒ์ด๊ธฐ ๋•Œ๋ฌธ์ด๋‹ค. 

 

์‹คํ—˜ ์„ค๊ณ„

๋งํ–ˆ๋“ฏ์ด ์ž˜ ์งœ์—ฌ์ง„ ๊ณ„ํš์ด ํ•„์š”ํ•˜๋‹ค.

๋‘ ๊ทธ๋ฃน์œผ๋กœ ๋‚˜๋ˆˆ๋‹ค. 

treatment group (test group) control group
receive treatment don't receive treatment

๊น”๋”ํ•œ ํ†ต์ œ๊ฐ€ ์–ด๋ ต๊ธฐ์— ,๋ฌด์ž‘์œ„ํ™”๋ฅผ ์‚ฌ์šฉํ•œ๋‹ค. 

Randomized controlled trial(RCT)

-  ์œ„์˜ ๋‘ ๊ทธ๋ฃน์— ๋ฌด์ž‘์œ„๋กœ ํ• ๋‹นํ•˜์—ฌ ๊ฒฐ๊ณผ๋ฅผ ๋น„๊ตํ•จ

Intention-to-treat analysis (ITT)

- bias๋ฅผ ํ”ผํ•˜๊ธฐ ์œ„ํ•ด, ์‹คํ—˜ ์ดˆ๊ธฐ ์›๋ž˜ ํ• ๋‹นํ•œ ๊ทธ๋ฃน์œผ๋กœ ์ง„ํ–‰, ์ค‘๋„ ํƒˆ๋ฝํ•œ ์‹คํ—˜์ž๊นŒ์ง€ ํฌํ•จ

 

์‹คํ—˜์„ ํ†ตํ•ด ๊ฐ€์ •์„ ์ž…์ฆํ•œ๋‹ค. 

์‹คํ—˜ ๊ฒฐ๊ณผ๋Š” ๊ตฌ์ฒด์  ๊ฒฐ๊ณผ ์ˆ˜์น˜(์œ„์˜ ์˜ˆ์‹œ๋กœ ๋ณด๋ฉด ์บ ํŽ˜์ธ ์ง„ํ–‰ํ›„, 10%๊ฐ€ ๋Š˜์—ˆ๋‹ค. )์™€ ์‹ ๋ขฐ๊ตฌ๊ฐ„(๋‹ค์‹œํ–ˆ์„ ๋•Œ ๋™์ผํ•œ ๊ฒฐ๊ณผ๋ฅผ ๋ณด์ผ ๊ฐ€๋Šฅ์„ฑ)

์ฆ‰, 10% lift in results, 90% confidence interval ์ด๋Ÿฐ ์‹์œผ๋กœ ๋‚˜์˜ค๊ฒŒ ๋œ๋‹ค. 

๊ฒฐ๋ก ์€ ๊ฐ€์ •์„ ์ˆ˜์šฉ, ๊ธฐ๊ฐ ๋‘˜ ์ค‘ ํ•˜๋‚˜๋‹ค. 

 

2. ๊ด€์ธก์„ ํ†ตํ•œ ๋ฐฉ๋ฒ• (Observational Methods)

- ๊ด€์ธก๋œ ์ •๋ณด๋“ค์„ ์ˆ˜์ง‘ํ•˜์—ฌ ์ธ๊ณผ๊ด€๊ณ„๋ฅผ ์ถ”์ธกํ•œ๋‹ค. ์ฃผ์ œ๋‚˜ ๋ณ€์ˆ˜ ํ†ต์ œ ์—†์ด ๊ณ„ํš ์—†๋‹ค๋Š” ๊ฒƒ์—์„œ ์‹คํ—˜๊ณผ ์ฐจ์ด๊ฐ€ ์žˆ๋‹ค. 

 

 

๋ฐ˜์‘ํ˜•