The Beta distribution is very useful for modeling the probabilistic behavior of certain random variables such as proportions, constrained to fall in the interval (0,1)
1.1 Study Designs
․Retrospective Studies
․Prospective Studies
※ Survival Analysis
; Deals with analysis of data that have "time to an event".
※ Survival time
; Time until an event occurs.
※ Event
; a. relapse of a disease
b. death
c. response to a treatment
; Economical,
To obtain answers quickly because the cas
company launch the many new model catching customer's eyes.
There are many imitation.
Product descriptions
Levi 's trousers have two classification standard is like this: " model " and "series”
Model:
501 : Mid-waistline and Straight canister pants
502: Classics Straight canister pants
503: Hight-waistlineandStraightcanistertrousers
505: Original Straight canister
model, only the highest organization is financed by the government and other social aids. By interpreting environment and understanding each center’s situation, it will distribute the money to the centers that seriously need money. In this way, the financial discrepancy among centers would possibly disappear.
Furthermore, this may enhance function of the higher organizations in terms of show
DISTRIBUTION
Automakers Develop the Franchise System, 1900-1950
종전의 자동차 생산업자들은 신차 개발과 생산에 많지 않은 자본을 투자하는 작은 회사들에 불과 했다. 한 회사가 독점하는 전국적인 유통망을 설립해야 하는데 필요한 자원과 자본의 부족으로 자동차 생산자들은 그들이 생산한 자동차들을 직접 판