• Korea journal of population studies
• /
• v.17 no.1
• /
• pp.73-86
• /
• 1994

In order for handicapped people to maintain better humane life, it is necessary to get statistics of them in developing appropriate national policy. However, it is very difficult to obtain baseline statistics on regular or occasional basis. It's reason is mainly attributed to attitudes of their family's tendency to conceal any existence of such memeber in the household. As a result, the statis-tics on the handicapped population is very inaccurate and under satisfaction. We must produce such statistics periodically in time and with accuracy. Thus, this study porposes five methods which, we believe, can produce reliable statistics of thehandcapped population : 1) vitalization through enforcement of handicapped information into the registration system, 2) inclusion in population census of items related to handicapped information, 3) improvement of the physically handicapped population survey scheme, 4) utilization of hospital patients' records for development of the statistics, and 5) an estimation through the labor force survey.

• Journal of the Korean Data and Information Science Society
• /
• v.18 no.1
• /
• pp.1-10
• /
• 2007

In this paper, we focus on churn analysis for the first successful candidates in the entrance examination on 2006 year using Clementine, data mining tool. The goal of this study is to apply decision tree including C5.0 and CART algorithms, neural network and logistic regression techniques to predict a successful candidate churn. And we analyze the churning and nochurning successful candidates and why the successful candidates churn and which successful candidates are most likely to churn in the future using data from entrance examination data of K university on 2006 year.

• Journal of the Korean Data and Information Science Society
• /
• v.18 no.4
• /
• pp.1023-1032
• /
• 2007

We introduce the statistical system of the Commonwelth Independence State(CIS) countries located in the Central Asia. At present, the level of the national statistics production system of Korean National Statistical Office(NSO) is very high and locate on just behind Japan among all asian countries, and they are also trying to reach the statistics quality level upto the advanced developed countries in the world. To have the optimal Statistics production processing, we must understand the methodologies parts as well as the aspect of the macro statistics that can be applied to the country#s economic plan. Like the history is repeated, it is valuable to look at the development history of statistical system of other countries one century ago. We study the relationship among CIS countries along with the history of Russian statistics development. It will be helpful to look and understand the statistical system of CIS countries including Russia to use their statistics for international comparison study.

• Journal of the Korean School Mathematics Society
• /
• v.7 no.2
• /
• pp.51-65
• /
• 2004

The purpose of this study was to develop the way in improving of teaching statistics in school mathematics. I reviewed the curriculum of Korea and America in statistics at School. I proposed the effective way of teaching statistics with the curriculum and content of statistics and the method of teaching of students and teachers.

• The Korean Journal of Applied Statistics
• /
• v.17 no.3
• /
• pp.595-603
• /
• 2004

Does database education need in statistics undergraduate course\ulcorner Then, how must we do education\ulcorner In this article we examine the necessity of database education in statistics department and propose some concrete plans for instruction. The goal of this article is to explore how to educate database in connection with statistics.

• Journal of the Korean Statistical Society
• /
• v.26 no.3
• /
• pp.365-382
• /
• 1997

In this paper we study the behaviors of the generalized Durbin-Watson (DW) statistics when the nonstationary seasonal time series regression model is misspecified. It is observed that when the series is seasonally integrated the generalized DW statistic for the seasonal period order autocorrelation converges in probability to zero while teh generalized DW statistic for the first order autocorrelation has nondegenerate asymptotic distribution. When the series is regularly and seasonally integrated the generalized DW for the first order autocorrelation still converges in probability to zero.

• Journal of Environmental Science International
• /
• v.9 no.1
• /
• pp.13-18
• /
• 2000

The purpose of this study is to estimate the low-flow statistics at the mountainous watershed. The formulation for the estimation of the design low-flow statistics was obtained by means of a hydraulic approach applied to a simple conceptual model for a mountainous watershed. Three of the independent variables associated with the low-flow statistics is watershed area(A), average basin slope(S) and the base flow recession constant(K); Watershed area was measured from topographic maps and average basin slope is approximated in this study using Strahler's slope determining method. And base flow recession constant computed using Vogel and Kroll's method. Unfortunately, this method is usually unavailable at ungaged sites. In this study, recession constant at ungaged sites is estimated using graphical regression method used by Giese and Mason. The model for estimating low-flow statistics were applied to all 61 catchments in the Sumjin, Mankyung basin.

• Journal of the Korean Statistical Society
• /
• v.25 no.2
• /
• pp.255-263
• /
• 1996

Let $(X_{1j}, X_{2j}, … , X_{nj}, Y_j/)$j = 1, 2, … , n, be a sample of size n on an (m + l)-dimensional vector $(X_1, X_2, … , X_m, Y)$, m .geq. 1. If $Y_{(r)}$ denote the rth order statistic from Y, then the $X_{[r:n]}$ paired with $Y_(r)$ is termed the concomitant vector of the order statistics. The general distributions of concomitant of order statistics will be found. The mean, variance and covariance of$X_{[r:n]}$ Will be studied. Then we will apply the results to the multivariate normal variate case.e.

• The Korean Journal of Applied Statistics
• /
• v.16 no.2
• /
• pp.395-406
• /
• 2003

In this thesis, we propose a test statistic for testing exponentiality against NBU alternatives. Our test statistics is based on a linear function of the order statistics and is readily applied in the case of small sample as well as large sample. The exact and asymptotic distribution of the test statistics is derived and asymptotic efficiencies are studied. Our new test is easier to compute and performs better for several alternatives than test of Hollander and Proschan(1972).

• Journal of Environmental Impact Assessment
• /
• v.6 no.1
• /
• pp.135-149
• /
• 1997

Environmental issues are currently in the forefront of the political and economic area both globaly and nationally. In the all spheres of socio-economic development and policy, it is suggested that there are need, to measure environmental impacts and to produce and disseminate environmental statistics systematically for environmentally sound and sustainable development. Specially, because environmental statistics encompass a wide spectrum of sectors from the natural to the social sciences and are dispersed among various agencies, an organized approach and compilation methods in complicated fields such as environment are required. This article includes the methodology on the framework for development of environmental statistics to advance korean environmental statistics.