Declaration of Authorship I, _____________________________________, declare that this dissertation entitled: “__________________________________________________________________”, and the work presented in it is my own. I confirm that: (1) This work is carried out under the auspices of the Department of Statistics and Operations Research as part fulfillment of the requirements of the Bachelor of Science (Hons.) course. (2) Where any part of this dissertation has previously been submitted for a degree or any other qualification at this university or any other institution, this has been clearly stated. (3) Where I have used or consulted the published work of others, this is always clearly attributed. (4) Where I have quoted from the works of others, the source is always given. With the exception of such quotations, this dissertation is entirely my own work. (5) I have acknowledged all sources used for the purpose of this work. Signature: _______________________ Date: _______________________