Statistical Abstracts (117th edition) provides information about state per capita income taxes. The distribution is mound shaped with mean  = $1,701 and standard deviation  = $672.

(a) Use the empirical rule to find an interval centered about the mean in which about 68% of the data will fall.

(b) Estimate a range of values centered about the mean in which about 95% of the state per capita income taxes will fall.