Objective　To explore the application and evaluation of S-P chart in analyzing examina-tion papers of nutrition and food hygiene and improve the quality of examination. Methods　15 papers were randomly selected from 56 examination papers of nutrition and food hygiene and 5

4

5

1

0 were randomly selected from the students with scores of <60

60-69

70-79

80-89

and 90-100 with stratified sampling method. S-P chart and fuzzy S-P chart were drawn according to objective and subjective questions. Results　In the S-P chart of multiple choice

both the P-curve and S-curve were in the lower right corner. There was no obvious fault on the S-curve

while P-curve had obvious faults. There were 2 questions and 1 student with alarm coefficient > 0.75. The difference

difficulty coefficient

stability coefficient and suitability coeffi-cient were 0.13

0.66

0.55 and 0.58 respectively. In the S-P chart of multiple choices

both the P-curve and S-curve were in the upper left corner. There was no obvious fault on the S-curve

while P-curve had obvious faults. There were 1 question and 1 student with alarm coefficient > 0.75. The difference

difficulty coefficient

stability coefficient and suitability coefficient were 0.10

0.30

0.64 and 0.60 respectively. In the S-P chart of subjective questions

the difference was 0.275

and both the P-curve and S-curve were in the upper left corner and had no obvious fault. Conclusion　The application of S-P chart can help teachers to analyze the difference between the quality of test questions and the grade of students

thereby making teaching more targeted and improving the quality of teaching and examination.