On a test of optimism, scores of people diagnosed with a particular disease are normally distributed with a mean of 20 and a standard deviation of 5. How high of a score does such a person with this disease need to be among the 5% most optimistic? Among the 20% most optimistic? How low of a score to be among the 10% least optimistic?

Answer rating: 100% (QA)

Solution The mean is 20 and standard deviation 5 Our main task now is to find the high ... View the full answer