幅圖係想回你講用predicting by model instead of exam

,雖然都有關,不過唔好講咁多,直接計數啦
Official Data:
https://www.hkeaa.edu.hk/DocLibrary/Media/Leaflets/HKDSE_SBA_A4booklet_Mar2018.pdf

你而家講緊band3仔同outliers,係(a)(甲) school A嗰種學校,平均公開試得20幾分,但有個outlier考80幾90幾分

用佢條formula,x_mean,z_mean大圍野,冇乜關係,畀夠一個5**學生有95分,Band 3學校內SBA都畀夠佢平均 35,出到公開試見真章,又有幾條友玩野,turn out落翻喺25上下,當間band3學校係band3群組入面嘅中間,beta同s_p/s_x嗰啲都係1啦,咁樣個5**學生個SBA已經得翻85,佔20%,坐底冇咗大分兩分
我已經未計你band3, s_p/s_x嗰度,入面有個s_z/s_x嘅factor,你一定細過1,最後成個分係跟倍數咁少,起碼冇咗5,6分,beta仲要係暗分,
而最重要係,依幾分係同個學生有冇努力完全冇關
你講所謂參照校內成績,唔會有太大影響,喺12345個tiers咁大嘅時候,仲要唔喺boundaries就得,我講5**/5*,年年得幾十個人,依幾分夠送你落5,條curve細(個分細eg.中英)嘅科更加係
