Question

How would we determine the right comparative method to use when analyzing the different studies that we are interested in using in our research?

Answer 1

A comparative study is defined as a study in which two (or more) treatments are going to investigate over a period of time and a comparison of various outcomes are examined using statistical tests. A statistical test is needed to ensure the robustness of the results relative to your study design...

First of all find out what is your research question/primary hypothesis?.. Clearly understanding about objective of the research is the first step.. And then You can use any of the following statistical analysis techniques which required for your research..

• In case you are dealing with numerical data like height, weight, haemoglobin, income, sales etc. You can use t-test or normal test for comparison of means of any two groups of interest.
• In case you are dealing with percentages or proportions such as proportion of defectives, proportion of particular disease etc use normal proportion test.
• In case of qualitative data like preference to music, dance, taste etc where you are able to categorize the data into groups, you can use chi-square test.
• For instance, I wish to see whether possession of TV, Computer, Refrigerator, Washing machine or car varies by different socioeconomic status then essentially I am dealing with frequencies. In such cases, use chi-square test.

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