400
Group 1 SAT SCORES: 1520, 1630, 1480, 1580, 1400, 1300, 1700, 1610, 1580, 1520
Group 2 SAT SCORES: 1510, 1480, 2100, 1800, 1300, 1250, 1400, 1430, 1390, 1520
Group 3 SAT SCORES: 1620, 1700, 1520, 1510, 1530, 1430, 2000, 1800, 1410, 1390
Which group has the smallest range?
Group 1