Sunday 57pin submitting an external tool Chapter 8 Confidence Intervals (Sample Size) Progress saved Done Score: 1/12 1/12 answered Question 2 0/1 You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately o = 25.5. You would like to be 9% confident that your estimate is within 3 of the true population mean. How large of a sample size is required? Hint: Video [ [+] n=