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
her Lotto prize money (Kang, 2004).
In such social circumstances, it is only natural that the Lotto has become a social issue, and that concerned voices are evolving from various point of views, raising this issue as a serious problem. Because of the seriousness of this problem, it is appropriate to emphasize the necessity of a close and objective analysis of the Korean Lotto market.
ANalysis Of VAriance)]은 '아노바'라고도 읽으며, 각 케이스의 관찰값과 평균 간 차이인 편차를 제곱해 합산한 후 표본크기로 나눈 분산을 이용해 2개 이상 집단 간 평균 차이를 검증하는 방법이다. 이 분석은 독립변인이 2개 이상 범주수준으로 측정된 질적 데이터이고, 종속변인이 유사등간수준 이상으로 측
death phase(사멸기)의 시기로 구분한다.
1. Lag phase(지체기)
세포들이 새로운 환경에 적응하기 위해서 분열 전 준비하는 과정을 말한다. 미생물을 처음 새로운 배양액에 접종하면 세포수가 바로 증가하지 않는데 이처럼 세포수가 증가하지 않는 초기의 단계를 지체기(lag phase)라 한다. 세포분열이 즉
of each accident is getting bigger because the frequency of disaster occurrence is being reduced by increasing interest and management.
< Shifts of industrial disaster rate >
There are serious problems such as a lowering will to work or destroyed family caused by damages like worker’s death. Therefore, it is necessary to have specific analysis focusing on heavy industrial disasters. However,