Mrs. Raynor, a school psychologist, tracks the number of students that are reported by teachers as having concerning behaviors in the classroom. At the end of the year, she calculated that 12.4% of the students in her school have been identified as having behaviors that impact their performance in the classroom. She understands that there is a margin of error to this estimate and reports that the number of children who have behavior problems at school may be as low as 10.2% and as high as 14.6%. What is the term used to describe the 12.4% calculation made by Mrs. Raynor?