Probability and Statistics (GSDR2109)
Higher Institute of Transport and Logistics (HITL)
Semester: First Semester
Level: 200
Year: 2017
School/Faculty: HITL
DEPARTMENT: LECTURER(S):
Academic Year: 2016/2017 CA
COURSE TITLE: Probability and Statistics
DATE: 12/04/2017 TIME: 2 hours
Instructions: Answer all questions
THE UNIVERSITY OF BAMENDA
P.O BOX 39 Bambili
REPUBLIC OF CAMEROON
Peace-Work-Fatherland
0 .
. 17 0
Problem 1 (6 points)
Define the following: (i) A population, (ii) A sample space, (iii) A sample Random
Sample
Problem 2 (9 points)
A sample random sample of containers is chosen from a large population of
containers in a certain railway terminal. The heights (in inches) of containers are given
as;
30, 223, 232, 223, 75, 80, 80, 126, 105, 149, 179
179, 79, 191, 236, 240, 242, 245, 247, 254, 274, 384, 470
Using the given data, calculate the following:
(i) The sample mean (ii) The sample media (iii) The 65
th
percentile of the
sample
Problem 3 (5 points)
A large industrial firm allows discounts on orders (invoices) that are paid within 30
days. Of all orders, 10% receive the discount. In a company, 12 orders are sampled at
random. What is the probability that fewer than 5 of the 12 sampled orders receive the
discounts?
SUCCESS WISHES!!!
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