Question

SAT Scores
Group 1
1520
1630
1480
1580
1400
1300
1700
1610
1580
1520
SAT Scores
Group 2
1510
1480
2100
1800
1300
1250
1400
1430
1390
1520
SAT Scores
Group 3
1620
1700
1520
1510
1530
1430
2000
1800
1410
1390
SAT Scores
Group 4
1480
1570
1400
1800
1930
2150
1340
1580
1530
1610

The SAT scores for 4 groups of 10 students are shown. Which group has the smallest mean absolute deviation?
A)
Group 1
B)
Group 2
C)
Group 3
D)
Group 4

Answer 1

Just enter the scores into your calculator:
MAD = 1/ (n-1) Σ ( x - mean)