Find the 97.5 percentile of the sample mean number of bits retained in short term memory?

Math 1401 Chapters 15 & 16 Class Sampling Distributions/Confidence Intervals Time of Class Meeting (Use this information to answer questions 1 - 6) In a famous research paper in the psychology literature, George Miller found that the amount of information humans can process in short-term memory was 7 bits (pieces of information), plus or minus 2 bits. Assume that the number of bits retained in short-term memory is normally distributed with a mean of 7 and the standard deviation is 2. Suppose that we take a simple random sample of 36 people and test their short-term memory skills. in short-term memory is greater than 7.5