The National Safety Council estimates that off-the-job accidents cost U.S. businesses almost $200 billion annually in lost productivity (National Safety Council, March 2006.) Based on NSC estimates, companies with at least 50 employees are expected to average three employee off-the-job accidents per year. What is the probability of at least two off-the-job accidents during a one-year period?
Assume that test scores from a college admissions test are normally distributed, with a mean of 450 and a standard deviation of 100. Suppose someone receives a score of 630. What percentage of the people taking the test score better?