Question

If im trying to determine correlation between two variables, BMI & ethnicity what kind of stastical test should i run? Race is a independent categorical , and nominal. BMI is dependent is quantitive and continuous

Hypothesis:

In a systematic review researchers found a higher prevalence among racial minorities compared to white/Anglos or any other race.

In conclusion, it is hypothesized that participants which are Latinos will show a positive correlation of increase BMI compared to other ethnic groups.

Answer 1

Selecting a hypothesis based on the measurement scale of dependent and independent variable is a tricky part.

In the given case, dependent variable is continuous and independent variable is categorical

When we have dependent variable as continuous and independent variable as categorical, then we use ANOVA to test the hypothesis.

if both variables are categorical, then we use chi square test

if both variables are continuous, then we use linear regression

if independent variable is continuous and dependent variable is categorical, then we use logistic regression