Cluster centroid

C₁

C₂

C₃

C₄

(Most frequently given answers)

1B, 2C, 3B, 4A

1B, 2B, 3E, 4A

1C, 2B, 3A, 4A

1C, 2C, 3B, 4B

Number of students

18

19

63

24

0.750, CI = (0.730, 0.763)

0.62, CI = (0.58, 0.64)

0.604, CI = (0.590, 0.616)

0.56, CI = (0.53, 0.58)

1.40

−0.02

−0.92

−0.46