NATIONAL OPEN UNIVERSITY OF NIGERIA
FACULTY OF AGRICULTURAL SCIENCES
DEPARTMENT OF CROP AND SOIL SCIENCES
2020_2 EXAMINATION 1234
EXAMINATION: JANUARY 2020_2 EXAMINATION
COURSE TITLE: STATISTICS AND RESEARCH METHODOLOGY
COURSE CODE: AGR 501
TOTAL SCORE: 70 MARKS
TIME ALLOWED: 2hours 30 minutes
INSTRUCTION: Answer FOUR Questions in all.
Question 1 is compulsory (30marks) and any four questions (10 marks each)
QUESTIONS
1.
a. Discuss extensively the difference between researchable and nonresearchable problems. (12 marks)
b. What are the major important tips to consider when making a choice of a
research problem? (15 marks)
c. Name the three methods use for data collection in agricultural research. (3marks)
2.
a. Give four reasons why null hypothesis is important in research. (4 marks)
b. State two examples of each of parametric and non-parametric test. (6 marks)
3.
List and Discuss elaborately the most frequently used parametric test for
agricultural research. (10marks)
4.
a. State the factors that affect the level of significance. (6 marks)
b. Enumerate the importance of hypothesis in agricultural research. (4 marks)
5.
a. Describe the two major classification of hypothesis (4marks)
b. Construct a flow diagram for hypothesis testing. (6marks)
6.
a. Give three advantages and of hypothesis testing. (4marks)
b. Define research design and list types of research design. (6marks)
7.
a. Highlight the major sources of error in Agricultural Research? (6 marks)
b. Describe the concept development as a technique in developing a measurement tool? (4
marks)
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