The average scores of students in a class in mathematics, Chinese and foreign languages are 90, 80 and 78 respectively, and the standard deviations are 8, 10 and 14 respectively. A classmate's scores in three subjects are 92, 88 and 85 respectively. Which subject is better for this classmate? (Please write down the calculation process)

Z language =(92-90)/8=0.25, Z math =(88-80)/ 10=0.8, Z foreign language =(85-78)/ 14=0.5. Z math > z foreign language > z language, so math scores are the best, followed by foreign languages, and finally Chinese.