Research Methods and Biostatistics (MFN-009)
Course Code: MFN-009
Assignment Code: MFN-009/AST-4/TMA-4/2022-23


Research Methods and Biostatistics (MFN-009)
Course Code: MFN-009
Assignment Code: MFN-009/AST-4/TMA-4/2022-23
Last Date of Submission: 15th March, 2023
Maximum Marks:100
This assignment is based on Units 1 -14 of the MFN-009 Course.
Section A – Descriptive Questions
There are eight questions in this part. Answer all questions. (80 marks)
1. a) Define research. Enlist the various scientific activities involved in a research process.
b) Define hypothesis. Enumerate basic characteristics of a good hypothesis. Enlist the
three forms of Hypothesis.

2. a) Explain the following with examples:
i) Cohort study
ii) Randomised control trials
iii) Case Control study
b) What are the two sampling methods in research. Explain any two methods of
probability sampling.

3. a) Differentiate between the following highlighting their uses in epidemiological studies:
i) Incidence and Prevalence
ii) Quota sample and snowball sample
iii) Cross sectional and correlational study
b) Enlist the various factors affecting the choice of sampling method. Write down
characteristics of a good sample.

4. a) Given below are the hemoglobin levels (gm %) recorded for 10 girls in class X.
9.8, 7.4, 10.3, 11.2, 12.5, 8.5, 9.0, 10.0, 10.5, 12.0
Calculation the mean, median, standard deviation and variance for the hemoglobin
levels reported above.
b) Differentiate between two-tailed and one-tailed tests of significance.
5. a) Explain the concept of confidence interval and degree of freedom with the help (2.5+2.5)
of an example.
b)Test the difference in the attitude of male and female subjects using chi-square
analysis towards exercise based on the distribution given here with (at 0.5 level
of significance):
6. a) Enlist the characteristics of a good Interview. What are the advantages and
limitations of using an interview in a research study?
b) Discuss briefly different types of attitude scales used in epidemiological studies.
7. a) Give one mortality and one morbidity measure for assessing the health status of
children in a community. Indicate how will u measure them.
b) Learners (n=10) enrolled in M.Sc . DFSM, scored following marks (out of 100) in
theory (X) and practical (Y). Find out the correlation coefficient and level of significance
for the two variables.
X: 46, 69, 79, 47, 35, 57, 98, 69, 58, 79
Y: 40, 50, 54, 47, 57, 40, 49, 46, 44, 48
8. a) The nutrition score of males (n=10)and female (n=12) students of M.Sc. (DFSM)
programme is given herewith:
Males:10, 12, 13, 10, 14, 15, 10, 12, 11,15
Females:08, 12, 16, 14, 15, 12, 13, 15, 08, 13, 10, 09
Based on the data given herewith:
i) Calculate the standard error of the difference between the means of the two groups.
ii) Test the significance of the difference between the mean nutrition score of males
and females at 0.05 level of significance.
b) What are the characteristics of case study. Explain them.
Section B – OTQ (Objective Type Questions) (20 marks)


2. a) Define the following: (10)
i) Epidemiology
ii) Plagiarism
iii) Bias
iv) Quasi Experimental Design
Positive Attitude Negative Attitude Total
Female 8 9 17
Male 8 5 13
Total 16 14 30
v) Statistics
vi) Proximity error
vii) Structured Questionnaire
viii) Documents
ix) Percentile Rank
x) Non parametric test
3. Differentiate between the following: (10)
i) Null hypothesis and Alternative hypothesis
ii) Type I error and Type II error
iii) Odds ratio and risk ratio
iv) t-Test and paired t-Test
v) Reliability and Validity


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