投資理財吹水室,第2彈

[H]csyuenl

你試下用呢4個角度諗下
1. product
2. price
3. place
4. promotion

piyopiyo

真係係d有興趣ge產品先會咁樣思考-.-...
如果咩都要咁樣思考就嘔血[[tk_21]]

[H]csyuenl

你去商界發展
工作未必遇岩你有興趣o既產品

Crossbone-X1

你講緊standard deviation of returns?

[H]csyuenl 發表於 21-6-2009 15:17

呢條就背鬼左佢啦= =
再唔係
(S.D.)^2=mean(x^2)-(mean(x))^2

city,poly 商應該唔難ar,你入到6901 ge話應該都入到city,poly
piyopiyo 發表於 21-6-2009 15:25

poly聽講都ok高
我自己未睇過
city ge話 我唔知出左黎d人點睇= =

我會諗頭3個問題因為我對咖啡有d研究[[tk_30]]
piyopiyo 發表於 21-6-2009 16:03

同好[[yoyo_019]]

你試下用呢4個角度諗下
1. product
2. price
3. place
4. promotion
[H]csyuenl 發表於 21-6-2009 16:07

通常我一見到d黑店就會諗起呢4樣野XD

[H]csyuenl

呢條就背鬼左佢啦= =
再唔係
(S.D.)^2=mean(x^2)-(mean(x))^2
Crossbone-X1 發表於 21-6-2009 18:09

[(return-expected rates of return)^2(probability)+(return-expected rates of return)^2(probability)+...]^1/2

Crossbone-X1

用番probability ge角度黎睇
Var.(X)=E(X^2)-(E(X))^2

p.s.
Var.=Varience of X=S.D.^2
E(X)=Expected Value of X=∫xf(x)=∫xP(x)
E(X^2)=Expected Value of X^2=∫(x^2)f(x)=∫(x^2)P(x)

我梗係覺得咁樣易記好多= =

[H]csyuenl

expected rates of return=(return)(probability)+(return)(probability)+...

Crossbone-X1

反正就係一堆case ge expected value加埋睇大圍啦= =

[H]csyuenl

唔怪得咁多學生考試高分
但考試以外能力低下
死背硬記算數
根本唔理解下咩黎

Crossbone-X1

就係理解左所以先寫最簡單ge present出黎算數
我日日做幾十題probi想唔理解佢都好難
唔通下下同佢寫晒d terms出黎咩

考試動物 我識唔少
但係我肯定我自己唔係囉
我考試跌硬watt= =