A simple random sample of size n is drawn from a normally distributed population, and the mean of the sample is x, while the standard deviation is s. What is the 90% confidence interval for the population mean? Use the table below to help you answer the question. Confidence Level 90% 1.645 z*-score 0.90.s n 1.645.s 1.96s 2.58.s 95% 1.96 99% 2.58