NATIONAL OPEN UNIVERSITY OF NIGERIA
14/16, AHMADU BELLO WAY, VICTORIA ISLAND, LAGOS
SCHOOL OF MANAGEMENT SCIENCES
MARCH 2014 EXAMINATION
Course Code: PSM 823 Credit Units: 2
Course Title: OPERATIONS RESEARCH AND STATISTICS
Time Allowed: 2 Hours
- Attempt Question 1 and any other two (2) Questions.
- Question 1 is compulsory and carries 30 marks while the other 2 Questions carry 20 marks
1b.Explain how to write a good questionnaire
1c. Distinguish between the following and give two examples of each:
i. Numeric and non numeric data
ii. Discrete and continous data
iii. Ordinal and continous data
2a. Explain tyes of sampling.
2b. In a survey of 50 PG students of the Charted Institute of Shipping where the ratio of
female to male is 10:40, draw a sample of 15 students using stratified sampling method.
- The number of births recorded in each of the 50 maternity centres, in Surulere Local
Government in October 2002, is as follows.
Construct a frequency distribution table using the interval-45-54, 55-64, etc.
- Discuss the following:
i. skewness and kurtosis
ii. Axiomatic Probability
iii. Permutation and Combination
iv. Sample space
v. Independent event
5a. What are the Characteristics of a binomial random variable?
5b. List seven (7) typical examples of random variable for which Poisson distribution
provides good model.
5c. Procedure for Hypothesis Testing.
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