Mean

Variance

1

2

3

4

5

Practical Content

4.320

1.593

0.740

Interesting Content

4.266

1.322

0.472

0.759

Personalized Content

4.028

1.507

0.389

0.376

0.778

AVC

4.375

1.428

0.515

0.593

0.644

0.741

SVC

4.185

1.164

0.465

0.470

0.529

0.706

0.784