The formula to calculate the Adverse Impact Ratio (AIR) is:
\[ AIR = \frac{SRm}{SRM} \]
Where:
Let's say the selection rate for the minority group (SRm) is 0.2, and the selection rate for the majority group (SRM) is 0.5. Using the formula:
\[ AIR = \frac{0.2}{0.5} = 0.4 \]
So, the adverse impact ratio is 0.4.