Table:
geography

standard
hexagon
forward sortation area

economic region
census division
225-km sides
75-km sides

distance

coefficient
-0.551
-0.573
-0.820
-0.742
-0.426

standard error
0.0461
0.0278
0.0620
0.0357
0.0146

own-region

coefficient
0.408
0.467
-0.101
-0.0215
1.052

standard error
0.1380
0.1210
0.1270
0.1170
0.0966

own-province

coefficient
0.743
0.679
0.472
0.483
0.909

standard error
0.0951
0.0633
0.0872
0.0783
0.0421

constant

coefficient
6.981
7.094
3.142
2.540
2.015

standard error
0.4900
0.3590
0.7760
0.4770
0.3830

border effect
2.10
1.97
1.60
1.62
2.48

number of observations
5,329
77,274
8,619
132,862
2,574,640

Statement: the result is a border effect that falls in a narrow range from 1.60 (large hexagons) to 1.62.
Question: what's the range of border effect of hexagons?
Answer: [1.6, 1.62]