Total

Chi-square

Dif

Fi

Fi%

Sig

A1

Satisfactory

52

24.50%

52.679

Unsatisfactory

120

56.60%

2

Do not know or do not know the demonstration

40

28.90%

0.000

A2

Satisfactory

53

25.00%

67.821

Unsatisfactory

126

59.40%

2

Do not know or do not know the demonstration

33

15.60%

0.000

A3

Satisfactory

104

49.10%

29.953

Unsatisfactory

39

18.40%

2

Do not know or do not know the demonstration

69

32.50%

0.000