On the Navajo Reservation, a random sample of 228 permanent dwellings in the Fort Defiance region showed that 68 were traditional Navajo hogans. In the Indian Wells region, a random sample of 147 permanent dwellings showed that 17 were traditional hogans. Let p, be the population proportion of all traditional hogans in the Fort Defiance region, and let p, be the population proportion of all traditional hogans in the Indian Wells region. In USE SALT (a) Find a 95% confidence interval for P, - p2. (Use 3 decimal places.) lower limit upper limit