A symptom of autism is a behavior called stimming, where a child will stare at their fingers wiggling in front of their face. A hospital has recorded minutes spent stimming per day for each autistic child over the past year. The mean amount of stimming is distributed normally with a mean of 150 minutes and a standard deviation of 60 minutes. A psychologist is interested in determining if the drug Fenfluramine will influence the amount of time spent stimming. A group of 9 autistic children were given the drug for two months and the mean amount of stimming for this group was 110 minutes.