Answer
Gender is not a numerical variable. Therefore, this statement is wrong.
Work Step by Step
A better way to write the statement is: "We have concluded that the gender of drivers has an association with automobile accidents."
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.