4. Detecting Gender Bias in a Test Question When analyzing one particular question on an IQ test, it is found that among the 20 people who answered incorrectly, 18 are women. Given that the test was given to the same number of men and women, all carefully chosen so that they have the same intellectual ability, find the probability that among 20 wrong answers, at least 18 are made by women. Does the result provide strong evidence that the question is biased in favor of men?