An honest broker selects a sample of final grades from 236 students who had participated in a longitudinal study. He determines that the population mean is 75 and the standard deviation is 48. What is the probability of selecting a sample of students whose final grades were 80 or better? (Round your answer to four decimal places.)

An honest broker selects a sample of nal grades from 236 students who had participated in a longitudinal study. He determines that the population mean is 75 and the standard deviation is 48. What is the probability of selecting a sample of students whose final grades were 80 or better? (Round your answer to four decimal places.) X