NATIONAL OPEN UNIVERSITY OF NIGERIA

UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF AGRICULTURAL SCIENCE
JANUARY/FEBRUARY 2013 EXAMINATION

B.Sc AGRICULTURAL EXTENSION AND MANAGEMENT.

STATISTICS AND RESEARCH METHODS IN EXTENSION (AEM 501)         

INSRUCTIONS:

Answer Five (5) questions only. All questions carry equal marks

TIME ALLOWED 3.00hr

1a. Briefly explain what you understand by research. (5marks)

1b. What are the common objectives of conducting research. (5Marks)

1c. List the types of researches that can be conducted and fully discuss any two. (10 Marks)

2a. Differentiate between Exploratory field studies and Hypothesis testing field studies. (8marks)

2b. List the specific procedures necessary in a research process (12Marks)

3a. List the criteria for good problem statement giving one example of such a statement. (7Marks)

3b. Enumerate the factors determining the selection of a problem and fully discuss any three. (13marks)

4a. Define and discuss the nature of hypothesis. (8Marks)

4b. What are the functions of hypothesis. (8marks)

4c Differentiate between Null hypothesis and Alternative hypothesis. (4marks)

5 Write short notes on the following

1. Dependent and independent variables. (8marks)
2. Moderator variable and control variable. (8marks)
3. Intervening Variables. (4Marks)

6. Discuss fully the following experimental designs

       a) Factorial design.

       b) Randomized block design.

       c) Latin-Square Design.

       d) Longitudinal Designs or Time Series Designs.

7a. What is a table and what are the rules for tabulation. (10Marks)

7b.With examples, differentiate between negatively skewed distribution and normal distribution. (10Marks)