Understanding Basic Statistics 6th Edition by Charles Henry Brase,Corrinne Pellillo Brase

Exercise 41

Navajo Lifestyle: Traditional Hogans A random sample of 5222 permanent dwellings on the entire Navajo Indian Reservation showed that 1619 were traditional Navajo hogans ( Navajo Architecture: Forms, History. Distributions by jett and spencer, University of Arizona Press).
(a) Let p he the proportion of all permanent dwellings on the entire Navajo Reservation that are traditional hogans. Find a point estimate tor p.
(b) Find a 99% confidence interval for p. Give a brief interpretation of the confidence interval.
(c) Check Requirements Do you think that np 5 and nq 5 are satisfied for this problem Explain why this would be an important consideration.