Consider the three-circle, red-on-white pattern discussed in Problem 11. How many ceramic potsherds must be found and identified if we are to be 95% confident that the sample proportion  of such potsherds is within 6% of the population proportion of three-circle, red-on-white patterns found at this excavation site?
Problem 11
Three-circle, red-on-white is one distinctive pattern painted on ceramic vessels of the Anasazi period found at the Wind Mountain archaeological site. At one excavation, a sample of 167 potsherds indicated that 68 were of the three-circle, red-on-white pattern.