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Section A-Descriptive problems

problem1) a) Briefly describe with the help of an ex the various activities of the research process.

b) What do you understand by the terms-Level of Significance and Power? Discuss their relevance in sample size determination.

problem2) a) With the help of a flow chart, classify the various research design’s available in epidemiological research.

c) Differentiate the following research designs, giving suitable exs.

(i) Analytic study – Descriptive study

(ii) Observational study - Experimental study

(iii) Case – Control study-Intervention study

(iv) Single blind study – Double blind study

problem3) a) What is meant by sampling? With the help of an ex, describe the concept of random sampling, stratified sampling, cluster sampling and purposive sampling.

b) Name the different types of tools available for data collection while undertaking research.

problem4) a) Given here are the scores of 20 student who took the practical course in nutrition.

57, 60, 64, 67, 67, 62, 61, 63, 70, 72

73, 70, 76, 76, 75, 70, 80, 80, 78, 78

For these scores present:

i) The frequency distribution and cumulative frequency distribution.

ii) Frequency polygon

b) Enumerate the graph you will prepare for the following, giving their advantages

i) Nominal or ordinal data

ii) Establishing relationship between two variables

problem5)a) Describe the concept of normal probability distribution.

b) List one mortality measure for assessing the health status of children in a community. How would you measure them? Indicate.

c) Consider the following bi variate data:

Infant outcome                 Weight gain during pregnancy                Total
< 8 kg                   > 8 kg
Alive                                         450                         300                   50
Total                                        600                          350                 900
Based on the data

(i) Compute the relative risk of infant death with weight gain of less than 8 Kg during pregnancy;

(ii) Compute the odds of dead children being born to pregnant woman with weight less than 8 Kg.

problem6)a) Given below are the haemoglobin level recorded for 10 subject in a community study:

9.8, 7.4, 10.3, 12.2, 12.5, 8.5, 9.0, 10.0, 11.0, 12.0

Calculation the mean, standard duration and variance for the haemoglobin levels reported above.

b) Given below one the theory and practical marks for 10 student on a nutrition course.

Theory marks:  46, 55, 52, 59, 63, 47, 56, 50, 51, 55

Practical marks: 41, 49, 54, 45, 58, 40, 45, 47, 44, 47

Establish, whether there is a degree of relationship between theory and practical marks.

problem7) a) The nutrition score of 7 males and 10 girls students of MSc. DFSM programme is given herewith:

Males:     11, 15, 14, 13, 13, 12, 13

Females: 09, 16, 14, 20, 13, 10, 12, 13, 12, 09

Based on the data given herewith.

(i) Compute standard error of the difference between means of the two groups, and

(ii) Test importance of the difference between the mean nutrition score of males and females at 0.05 level of significance.

b) Differentiate 2 tailed and one-tailed tests of significance.

problem8)a) The following table demonstrate the number of males and females who are anemic and non-anemic in the research study.

Subject           Anemic                Non-anemic                        Total

Male                  09                          43                                   52
Female              44                          04                                   48
Total                 53                           47                                  100

Test whether there is a relationship between anaemia and sex status in the population under study. Test at 05 level of significance.

b) Define and describe the concept of confidence interval and degree of freedom with the help of an suitable ex.

Section B-OTQ (Objective Type problems)

problem1)

Describe the following in 2-3 sentences.

i) Cohort study

ii) Discrete variable

iii) Null hypothesis

iv) Beta error

v) Clinical trial

vi) Quasi experimental design

vii) Nominal scale

viii) Validity

ix) Mode

x) O give

problem2) Differentiate the following sets of terms.

i) Percentile and Quartile

ii) Sensitivity and Specificity

iii) Mean and Median

iv) Descriptive Cross-sectional study and Analytical Cross-sectional study

v) Parameters and Statistics

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