The Commonwealth of Pennsylvania is concerned about the dwindling number of family-owned farms and the number of smaller, less efficient farms. In a random sample the total acreage of each farm was recorded. The mean was 1125 acres, with a standard deviation of 250. The shape of the distribution of areas is not normal.
Fill in the blank. (Give your answer to four decimal places.)
The approximate proportion of areas that lies between 375 and 1875 is.