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Agri 571: Research Designs And Data Analysis Question Paper

Agri 571: Research Designs And Data Analysis

Course:Masters In Agriculture

Institution: Kenya Methodist University question papers

Exam Year:2013

KENYA METHODIST UNIVERSITY
FACULTY OF SCIENCE AND TECHNOLOGY
END OF SEMESTER EXAMINATION FOR MASTER IN AGRICULTURE DECEMBER, 2013
UNIT CODE : AGRI 571
UNIT TITLE : RESEARCH DESIGNS AND DATA ANALYSIS

TIME: 3 HOURS

INSTRUCTIONS : Answer ALL Questions in Section A and any TWO in Section B
SECTION A
Question One
Distinguish between the following terms as used in research:
Validity and reliability of research instruments
Independent and dependent variable
Experimental unit and experimental error
Replication and blocking
Primary data and secondary data.
(5marks)
With the help of figures and diagrams, show the difference between a randomized complete block and design and a latin square design.
(5marks)
Question Two
What is the importance of literature review in any research work?
(5marks)
Discuss the process and method of conducting literature review.
(5marks)
Question Three
Fill in the blanks in the following analysis of variance table;
Source of Sum of Degrees of Mean F
Variation Squares Freedom Square
Between groups ________ 2 ______ ______
Within groups ________ 11 14
Total 200 _______
(10marks)
SECTION B
Question Four
With illustrations distinguish between split-split plot and a strip- split plot on a randomized complete block design.
(10marks)
What would be the various sources of variation in a factorial experiment?
(5marks)
Question Five
An agricultural engineer identifies four ways that a certain job can be done. To determine how long it takes workers to do the job when each of these methods is used he asks four workers to do the job using method B and so on. Each worker`s time in (seconds) is shown below:
Method A Method B Method C Method D
19 18 21 22
17 16 20 23
22 15 19 21
20 14 19 20
a) Which method seems slowest? Fastest. (2marks)
b) Construct the relevant analysis of variance table. (8marks)
c) Can the differences among methods in average time be attributed
to chance let ? = 0.01. (2marks)
d) criticize the design or this experiment. (3marks)
Question Six
A sample of ten agricultural text books shows the following relationships between their prices and length.
Price Length
16 520
20 680
21 740
9 200
10 400
22 800
20 750
15 500
10 300
10 350
i) Construct a scatter diagram of these data. (2marks)
ii) Compute the sample regression line where the price is the
dependent variable and length is the independent variable.
(6marks)
What is coefficient of determination?
(3marks)
Discuss any TWO types of regression models you can use in research.
(4marks)

Agri 571: Research Designs And Data Analysis Question Paper

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