An index number provides a simple way to compare measurements made at different times or in different places. The Cost of Living Index (COLI) is an index number used to compare expenses from one town or geographic region to another. It is based on housing, utilities, grocery items, transportation, health care, and miscellaneous goods and services; 100 represents the national average. The data sets below include the COLI, rounded to the nearest whole number, of four samples of six cities grouped by geographic region. Which region has the least variation or spread? Cost of Living Index Numbers (COLI) Northeast: 119, 82, 101, 100, 75, 73 Midwest: 77, 79, 67, 72, 58, 65 Select the correct answer below: West: South: 96, 64, 80, 73, 64, 66 75, 78, 76, 71, 70, 65