h 8 HW: Confidence Intervals Progr core: 21/28 9/12 answered Question 11 You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately o = 26.9. You would like to be 98% confident that your estimate is within 2 of the true population mean. How large of a sample size is required? Round up to nearest whole number. Question Help: Video B Written Example Message instructor Submit Question Jump to