Total

Chi-square

Dif

Fi

Fi%

Sig.

A15

Satisfactory

96

45.30%

40.821

Unsatisfactory

27

12.70%

2

Do not know or do not know the demonstration

89

42.00%

0.000

A16

Satisfactory

67

31.60%

33.972

Unsatisfactory

38

17.90%

2

Do not know or do not know the demonstration

107

50.50%

0.000