# MFN-009 Research Methods and Biostatistics Solved Assignment 2021-2022

Contents

## Solved Assignment 2021-2022

Research Methods and Biostatistics (MFN-009)
CourseCode:MFN-009
Assignment Code: MFN-009/AST-4/TMA-4/2021-22
Last Date of Submission: 15th March, 2022

Title Name

#### MFN-009 Solved Assignment 2021-2022

University IGNOU
Service Type Solved Assignment (Soft copy/PDF)
Course Master of Science in Dietetics and Food Service Management
Language ENGLISH
Semester 2021-2022 Course: M.Sc. (DFSM)
Session July 2021 session
Short Name MFN-009
Assignment Code MFN-009/AST-4/TMA-4 /21-22
Product Assignment of M.Sc. (DFSM) 2021-2022 (IGNOU)

This assignment is based on Units 1 -19 of the MFN-004 Course.
Section A -Descriptive Questions
There are eight questions in this part. Answer all questions.
(80
marks)
1. a) Define research. What do you understand by the terms -Level of Significance and
Power? Discuss their relevance in sample size determination. (6)
b) Define hypothesis. Enumerate basic characteristics of a good hypothesis. (4)
(6)
(4)
2. a) Explain the following with examples:
i) Clinical trials
ii) Double bind trials
iii) Correlation studies
b) What do you understand by probability and non-probability sampling? Explain the
various methods of non-probability sampling.
(2+2+2)
(4)
3. a) Differentiate between the following highlighting their uses in epidemiological studies:
i) Open ended and close ended questionnaire
ii) Cluster sampling and stratified sampling
iii) Cross sectional and case control study
b) Explain the various types of interviews? Write down different techniques used to conduct
interview
(2+2+2)

(4)
4. a) Given below are the hemoglobin level recorded for 10 subject in a community study:
8.8, 6.4, 10.3, 11.2, 12.5, 8.5, 9.0, 10.0, 11.0, 12.0
Calculation the mean, standard deviation and variance for the hemoglobin levels reported
above.
b) Differentiate between two-tailed and one-tailed tests of significance.
(2+3+3)
(2)
5. a) Define the concept of confidence interval and degree of freedom with the help of an
example.
b)Test the difference in the attitude of male and female subjects using chi-square analysis
towards eating junk food based on the distribution given here with (at 0.5 level of
significance):
(2.5+2.5)
(5)
12
Positive Attitude Negative Attitude Total
Male 8 7 15
Female 7 5 12
6. Briefly discuss the characteristics of a good questionnaire. What are the advantages and
limitations of using a questionnaire in a research study?
b) Briefly discuss different types of rating scales used in epidemiological studies.
(3+3)
(4)
7. a) Differentiate between the following research designs, giving appropriate examples.
i. Analytical study – Descriptive study
ii. Observational study – Experimental study
iii. Case – Control study – Intervention study
iv. Single blind study – Double blind study
b)Explain briefly the significance of control, manipulation and observation in an
experimental study
(2+2+2+2)
(2)
8. The nutrition score of 8 males and 12 girl students of M.Sc. (DFSM) programme is given
herewith:
Males:10, 12, 13, 10, 14, 15, 10, 12
Females:08, 12, 16, 14, 15, 12, 13, 15, 08, 13, 10, 09
Based on the data given here with:
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) Differentiate between validity and reliability of a research tool.
(3)
(5)
(2)
Section B – OTQ (Objective Type Questions)
1. a) Define the following: (10)
i) Double blind trial
ii) Percentiles
iii) Placebo
iv) Stratified Sampling
v) Proximity error
vi) Normal Distribution
vii) Inductive analysis
viii) Errors in statistical decisions
ix) Degree of freedom
x) Limit of accuracy
2. Differentiate betweenthe following: (10)
i) ANOVA and Factor Analysis
ii) Bar Graph and Histogram
iii) Parametric and Non-Parametric Test
iv) t-Test and F-Test
v) Descriptive studies and Analytical studies