N

Average

Standard deviation

Minimum

Maximum

Access

Group I

171

0.131

0.930

−2.924

1.597

Group II

69

−0.325

1.097

−3.935

1.400

Quality

Group I

171

−0.027

0.777

−2.729

2.475

Group II

69

0.068

1.414

−2.986

8.835