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Hypothesis tests are very commonly used in epidemiological investigations, and a wide number of tests are available. These can be classified into groups according to the [[Data types|data types]] in question, according to whether a specific underlying distribution is assumed when performing the test (in which case, the test is known as a '''parametric test'''), and according to whether or not the data are matched or independent (i.e. whether comparisons are being made at the individual level or the group level).<br>
 
Hypothesis tests are very commonly used in epidemiological investigations, and a wide number of tests are available. These can be classified into groups according to the [[Data types|data types]] in question, according to whether a specific underlying distribution is assumed when performing the test (in which case, the test is known as a '''parametric test'''), and according to whether or not the data are matched or independent (i.e. whether comparisons are being made at the individual level or the group level).<br>
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==Comparing a categorical outcome between different groups==
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==Comparing a qualitative variable between different groups==
===Independent samples===
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====Chi-square test====
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===Matched designs===
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====Fisher's exact test====
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==Comparing a quantitative outcome between different groups==
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==Comparing a quantitative variable between different groups==
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===Two groups===
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====t-test====
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===Independent samples===
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====Mann-Whitney U test====
====Two groups====
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====More than two groups====
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===More than two groups===
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====ANOVA====
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===Matched designs===
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====Kruskal-Wallis====
====Two groups====
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==Comparing two quantitative outcomes (matched designs)==
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==Comparing a categorical outcome between matched observations==
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====McNemar's chi-square test====
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==Comparing a quantitative outcome between matched observations==
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====Paired t-test====
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==Comparing two quantitative outcomes between matched observations==
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====Pearson's correlation coefficient====
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====Spearman's rank correlation coefficient====
    
[[Category:Veterinary Epidemiology - Statistical Methods|F]]
 
[[Category:Veterinary Epidemiology - Statistical Methods|F]]
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