1. A population is normally distributed with a mean of 100 and a standard deviation of 15. What is the probability of randomly sampling 30 individuals and finding that they have a MEAN of 98 or more?
2. Assume adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15. Find the IQ value that separates the bottom 20% of IQ scores from the top 80%