A study was conducted on 1,000 randomly chosen people to determine the effect of sex on IQ ranges. The following results were recorded:
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1. What is the probability of a person having an IQ below 90, given that the person is a female? A male?
2. What is the probability of a person having an IQ above 120, given that the person is a female? A male?
3. What is the probability of a person having an IQ below 90?
4. What is the probability of a person having an IQ between 90 and 120?
5. What is the probability of a person having an IQ between 90 and 120, given that the person is a male?
6. What is the probability of a person being female and having an IQ above 120?
7. Is IQ dependent relative to sex?