In the population, scores of students on Test X had mean ,u = 74 and standard deviation 0 = 8. An SRS of 90 students who took the exam is taken. Round the standard deviation of the sample mean score 2 to four decimal places. Using that rounded number, what is probability that the mean score )7 of these students is 75 or higher? (Round your final answer to four decimal places. Remember to express your answer as a proportion.)