assume that the population of maryland is distributed as follows: 13% live in the city of baltimore, 37%, live in the baltimore suburban area, 37% live in the washington , D.C., suburban area, and 13% live elsewhere in the state. assume, for purposes of illustration, that the sample was stratified to equally represent these four areas(25 %, 25 %, 25 %, and 25 %). Finally, assume that the percentage of respondents who report having purchased a gun for protection varies across the four areas as follows: 32% of baltimore residents say yes compared with 20% in each of the other three areas.