2002 Legislative Redistricting

Vermont Senate

The major statistic used in comparing redistricting plans is the

percent deviation(see below for explanation). This page allows you to quickly calculate the percent deviation for any district.Please enter the population of the Senate district and its number of Senators:

The following tables show the percentage deviation for a 1-member Senate district of various sizes.

%Deviation by Population Population % Deviation 17500 - 13.77% 18000 - 11.30% 18500 - 8.84% 19000 - 6.38% 19500 - 3.91% 20000 - 1.45% 20294*0.00%20500 1.02% 21000 3.48% 21500 5.94% 22000 8.41% 22500 10.87% 23000 13.33%

Population by %Deviation % Deviation Population - 12.00% 17859 - 10.00% 18265 - 8.00% 18670 - 6.00% 19076 - 4.00% 19482 - 2.00% 19888 0.00%20294*2.00% 20700 4.00% 21106 6.00% 21512 8.00% 21918 10.00% 22323 12.00% 22729 * Ideal population

Calculation of the Percent Deviation:

(1) An “ideal district” is determined by dividing the population of the state by the total number of representative districts. With 30 Senate districts in Vermont, following the 2000 census, the “ideal district” will have a population of exactly 20,294.

(2) The “deviation from the ideal” of each individual district is then calculated and expressed as a percentage. For example, a district with ten percent more population than the ideal district has a deviation of +10% and a district with nine percent less population than the ideal has a deviation of –9%.

(3) The “overall deviation” from the ideal for the entire plan is calculated by adding the percentage deviation from the ideal of the largest district in the state plan to the percentage deviation from the ideal of the smallest district in the state plan (disregarding positives or negatives). In the example above, if the largest district has a deviation of + 10% and the smallest has a deviation of – 9%, the “overall deviation” of the plan for the entire state in 19%. For reference, the redistricting plan enacted by legislature for the House in 1992 had an overall deviation of 17.6%