Urb alowered . Question 1 You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately o = 70.9. You would like to be 95% confident that your estimate is within 2 of the true population meant. How large of a sample size is required? [Do not roor mid-calculation. However, use a critical value rounded to three decimal places - this is important for the system to check answers correctly.] Question Help: Message instructor Submit