The aims of the article are to investigate risk factor that influences Coronary Heart Disease (CHD) by logistic regression method, and to know structural association in segmentation observation based on CHD patient or not by CHAID method, and comparing the result of classification between them. The result of logistic regression

There are many problems in applied sciences, physics, and engineering that are mathematically modeled by using differential equations and boundary conditions. Sometimes, to find analytic or exact solutions of ordinary differential equations are very difficult. Other solutions besides analytic or exact solutions are numerical solutions or approximat

Article discusses the probability distribution of the total maintenance cost of a component over a finite time horizon. The maintenance cost is assumed to be a function of the component lifetime. The marginal distribution of the total maintenance cost is presented in the form of Laplace transform. Article also presents

Handphone as a tool that is very important for communication among people. There is a strong competition among producer to get customers. Article identifies factor affecting costumers choice of handphone, as of direct and indirect effects. Result of the study shows that fiture of the handphone as direct

Article discussed the modification to form gamma function became the probability density function as gamma distribution and determine the chi-square distribution as a special form resulted from gamma distribution. The aim of this article is to clarify the role of the gamma distribution in the statistics analysis through the use

Change of request and nature of product frequently cause the expense of marketing becoming unstable, therefore it is often realised that the expense of marketing, is high and it is know after process of accounting. So that the profil is not optimal done, even lose. Forecasting of marketing expense is

To know population of active students in a university is very important because this matter assists the management in preparing facilities, resources and others. This study focuses on calculating the population of active students majoring in Information System in a university by using Verhulst equation. Result of calculation indicates that

Verification signature system is one of the security systems used to determine personal right in accessing certain resource or information. Signature considered to be a good identifies appliance, in which autograph cannot be stolen and loaned to others. The usage of this signature is very wide for example in badge,