A white high school student is worried about her upcoming orchestra concert, but calms herself down by thinking, "We have five Chinese students playing violin and viola. They've got the Chinese advantage in music, so the concert will be just fine." This is an example of

Prejudice

Explanation:

Prejudice is a negative preconception of of an individual that often leads to unfavourable attitude towards such individual. Prejudice may arise from a baseless stereotyped beliefs about an individual's gender, social class, age, beliefs, values, religion, sexuality, race/ethnicity, language, political affiliation, nationality, beauty, occupation, education or other personal characteristics that can influence (especially negatively) how a person behaves towards such individual.

From this question, the white student has prejudiced opinion about the concert based on the ethnic background of the Chinese students

answer; ratification;