With the help of a flow chart, classify the various research design’s available in epidemiological research.
In observational studies, the researcher observes and systematically collects information, but does not try to change the people (or animals, or reagents) being observed. In an experiment, by contrast, the researcher intervenes to change something (e.g., gives some
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What are the points that you will keep in mind while deciding the sample size for a study? Give one simple formula you would use for sample size determination.
Tests
Briefly describe how can you ensure the quality of data collected is sound.
Given here are the scores of 20 students who took a practical course in nutrition.
For the scores present give the
i) The frequency distribution and cumulative frequency distribution.
ii) Frequency polygon.
Analytic study- Descriptive study
The nutrition score of 8 males and 12 girl students of M.Sc. (DFSM) programme is given
Here with:
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 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.
List the non-parametric tests you can use for research.