An IQ test, if designed properly, should result in an average test score across the entire target population of 100 with a standard deviation of 10. Note that one of the key factors here is target population: IQ tests are notoriously biased by factors of age and culture.
Once the offer has been made, the candidate is given less than two weeks (an average of 13.3 days) to make a decision. That's the average length of time to get a job offer for one sector of the job market. For others, offers were received within 24 - 48 hours of interviewing. In other cases, the hiring process can drag on for weeks. There are a number of reasons why an employer might not give you a job offer right away.
However, knowing an average response time might give you some insight into how long it could take. Companies interested in hiring recent college graduates take an average of 24 business days after the interview to extend a job offer, according to a March 2013 article published by website Brazen Careerist. Because those are business days, the response time could take up to five weeks or longer. The average time frame varies by industry. An electronics and computer manufacturing company takes around 16 days to make an offer, the site says. An accounting job has an average response time of 17 days.