With the definition of the word "percentile" I found this exemple: "Ninety percent of the values lie at or below the ninetieth percentile, ten percent above it." What does it mean? AND what is the difference between

Hello, I am a Dental Hygienist with over 20 years experience in the Dental Industry. I work in private practice and also provide tutoring to International dentists preparing for the OET in Dentistry and planning on working in Australia. I am