Question

You are asked to examine the association between age and asthma. Age is measured as a quantitative variable and asthma is a categorical variable. What is the most appropriate statistical test to use? Explain your answer.

Answer 1

I am asked to examine the association between age and asthma. Age is measured as a quantitative variable and asthma is measured as categorical variable. The most appropriate statistical test would be Spearman's Correlation coefficient Test.

Correlation is used to test relationship between quantitative variable or categorical variable. In other words, it's a measure of how things are related. The study of how variables are correlated is called correlation analysis. This is used to quantify the degree to which two variables are related. Through the correlation analysis, we can evaluate correlation coefficient that tells us how much one variable changes when the other one does. This analysis provides a linear relationship between two variables.

That is why, Spearman's Correlation coefficient Test is the appropriate test for this problem.