You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately o = 33.5. You would like to be 95% confident that your. estimate is within 0.1 of the true population mean. How large of a sample size is required? [Do not round mid-calculation. However, use a critical value rounded to three decimal places - this is important for the system to check answers correctly.] n = > Next