A study was conducted to estimate the association between exposure to lead paint in childhood and attention-deficit hyperactivity disorder (ADHD). Data on N=750 children are collected, and data on exposure and ADHD diagnosis are shown in the Table

Expose to lead paint	attention-deficit hyperactivity disorder ADHD
Yes	No
Yes	53	197
No	71	429

Use the data to calculate:

1. The incidence of ADHD in the exposed group?
2. The incidence of ADHD in the unexposed group?
3. Estimate the relative risks (RR) for a child's diagnosis of ADHD relative to exposure to lead paint: (0.5 point for the formula + 0.5 point for the result)
4. Based on the computed test statistic in question 3, what is your interpretation?

What is your interpretation if the result in question for is equal to 1 RR=1