-
Application of Data Mining Technology in the Loss of Customers in Automobile Insurance Enterprises
Issue:
Volume 4, Issue 1, February 2018
Pages:
1-5
Received:
8 November 2017
Accepted:
4 December 2017
Published:
15 January 2018
Abstract: This paper is based on the customer churn data of auto insurance, construction of index system in three aspects: the customer information, the subject matter of the insurance information and hold product information; This paper uses decision tree and Logistic regression model to analyze the insurance company's customer data; The results show that: discount, total discount rate, total premium and other variables have a significant impact on customer churn, and get the loss probability of each customer and get some main features of lost customers.
Abstract: This paper is based on the customer churn data of auto insurance, construction of index system in three aspects: the customer information, the subject matter of the insurance information and hold product information; This paper uses decision tree and Logistic regression model to analyze the insurance company's customer data; The results show that: ...
Show More
-
Demographic Survey of Married Women in Barau Dikko Specialist Hospital Kaduna State
Issue:
Volume 4, Issue 1, February 2018
Pages:
6-12
Received:
20 October 2017
Accepted:
15 November 2017
Published:
29 January 2018
Abstract: This study undertakes a demographic survey of married women in Barau Dikko Specialist Hospital. A sample of 160 married women going for maternity (Antenatal and Postnatal care) were administered questionnaires. The analysis reveals that the mean age at menarche is 13 years; mean age of women at last delivery is 31 years and the average duration of breastfeeding for the women’s first child is 14 months. The analysis also shows that the duration of breast feeding for the women’s first child is 14 months. This research made use of correlation analysis to investigate if there is a relationship between breastfeeding and postpartum amenorrhea. We observed that there is a perfect positive correlation of 0.35 between the duration of postpartum amenorrhea (PPA) after the first life birth (months) and the duration of breastfeeding for the last but one life birth (months) at 1% level of level of significance. Also, it was observed that there is no relationship of 0.12 between the duration of postpartum amenorrhea (PPA) after the first life birth (months) and duration of breastfeeding for the first life birth (months).
Abstract: This study undertakes a demographic survey of married women in Barau Dikko Specialist Hospital. A sample of 160 married women going for maternity (Antenatal and Postnatal care) were administered questionnaires. The analysis reveals that the mean age at menarche is 13 years; mean age of women at last delivery is 31 years and the average duration of ...
Show More
-
On Commutativity of Rings Under Certain Polynomial Constraints
Issue:
Volume 4, Issue 1, February 2018
Pages:
13-19
Received:
9 January 2018
Accepted:
27 February 2018
Published:
19 March 2018
Abstract: The pioneer theorem of Weddernburn on commutativity of division rings was proved in the very beginning of twentieth century. Aside from its own intrinsic beauty and important role in many diverse parts of algebra specially, the theorem serves as the starting point for investigations of certain kinds of conditions that render a ring commutative. A large part of the results in this area was developed in the hands of many distinguished mathematicians like Jacobson, Herstein, Kaplansky, Faith, Martindale, Nakayama, Bell and many others. The purpose of the present paper is to investigate commutativity of a ring with unity 1 satisfying certain polynomial constraints. The main result of the first section asserts that a ring is commutative if at least one of the integral exponent used in the polynomial constraints of the theorem is zero and the ring also satisfies the property Q(n) Further, in the second section, commutativity of a ring with unity 1 has also been established under a set of different polynomial identities applying the most frequently used technique known as Streb’s classification. Finally, in the last section, these results of the foregoing sections are further extended to a special class of rings called as one sided s - unital rings.
Abstract: The pioneer theorem of Weddernburn on commutativity of division rings was proved in the very beginning of twentieth century. Aside from its own intrinsic beauty and important role in many diverse parts of algebra specially, the theorem serves as the starting point for investigations of certain kinds of conditions that render a ring commutative. A l...
Show More
-
Numerical Solution of Nonlinear Systems of Algebraic Equations
Kamoh Nathaniel Mahwash,
Gyemang Dauda Gyang
Issue:
Volume 4, Issue 1, February 2018
Pages:
20-23
Received:
29 January 2018
Accepted:
27 February 2018
Published:
23 March 2018
Abstract: Considered in this paper are two basic methods of approximating the solutions of nonlinear systems of algebraic equations. The Steepest Descent method was presented as a way of obtaining good and sufficient initial guess (starting value) which is in turn used for the Broyden’s method. Broyden’s method on the other hand replaces the Newton’s method which requires the use of the inverse of the Jacobian matrix at every new step of iteration with a matrix whose inverse is directly determined at each step by up-dating the previous inverse. The result obtained by this method revealed that the setbacks encountered in computing the inverse of the Jacobian matrix at every step number is eliminated hence saving human effort and computer time. The obtained results also showed that the number of steps that is reduced when compared to Newton’s method used on the same problem.
Abstract: Considered in this paper are two basic methods of approximating the solutions of nonlinear systems of algebraic equations. The Steepest Descent method was presented as a way of obtaining good and sufficient initial guess (starting value) which is in turn used for the Broyden’s method. Broyden’s method on the other hand replaces the Newton’s method ...
Show More
-
Assessment and Selection of Competing Models for Count Data: An Application to Early Childhood Caries
Agnes Njambi Wanjau,
Samuel Musili Mwalili,
Oscar Ngesa
Issue:
Volume 4, Issue 1, February 2018
Pages:
24-31
Received:
19 February 2018
Accepted:
19 March 2018
Published:
23 March 2018
Abstract: Count data has been witnessed in a wide range of disciplines in real life. Poisson, negative binomial (NB), zero inflated Poisson (ZIP) and zero inflated negative binomial (ZINB) are some of the regression models proposed to model data with count response. All the count models are potential candidates that can model count data, but there is no means to choose the one that would perform better than the others. This study aimed to assess the count models mentioned earlier at various degrees of zero inflation. Datasets were simulated with ZIP distribution with different conditions of zero inflation (0%, 2%, 5%, 10%, 15%, 20%, 30% and 40%). Poisson and NB were observed to predict regression coefficients well when the proportion of zero is below 15%. The two ZIM performed well at higher degrees of zero inflation; beyond 15% for ZIP and 20% for ZINB. Exploratory examination of the caries data revealed a zero inflation below 15%, that is, 3.23%. Analysis of early childhood caries (ECC) data among 3-6 year old children who visited Lady Northey Dental Clinic was then performed with Poisson and NB. Akaike information criterion (AIC) test was used to compare all the competing models both under simulation and with real data. Poisson yielded lower AIC values at lower zero inflation rates as compared to other three models. ZIP had the lowest AIC value at 10%, 15%, 20%, 30% and 40% levels of zero inflation. NB model had the lowest AIC value when real data was analyzed. Education level of the father- primary school completed, chewing gum several times a week, Feeding habit jam several times a day, Feeding habit juice every day, Feeding habit soda every day and Feeding habit sweets several times a week were found to be significant factors causing ECC.
Abstract: Count data has been witnessed in a wide range of disciplines in real life. Poisson, negative binomial (NB), zero inflated Poisson (ZIP) and zero inflated negative binomial (ZINB) are some of the regression models proposed to model data with count response. All the count models are potential candidates that can model count data, but there is no mean...
Show More
