Identify if the boldface number is a parameter or a statistic. Researchers surveyed 14,765 American high school students (grades 9-12) and found that 27.3% of those surveyed were in grade 9. The percentage of all American high school students who are are in grade 9 is 26.5%. The percentage of those surveyed who were in grade 9 and had carried a gun to school was 4.40%