Statistical Methods
For statistical analysis, the incidence, mortality rates, GDP, and GDP per capita will be first tested for normality. Since the sample size of the data is greater than 50, the Kolmogorov-Smirnov test should be used \citep{Mishra2019}. If factors that are analyzed at a given time are normal, Pearson’s product-moment correlation coefficient should be used \citep{Mukaka2012}. However, if one of the factors that are analyzed is not normal, Spearman’s rank correlation coefficient should be used. Correlational analysis should be used in order to see if there is a relationship between these variables and if that relationship is significant. The pairings of the variables are shown below: