A college is concerned that external stressors might be causing their students to have an increased resting heart rate Before investing in a consultant firm to investigate, the college decided to take a sample of 75 male students to determine whether the average resting heart rate was unusual. After conducting the survey, the college found a mean resting heart rate of the students to be 72. What is probability that a sample of 75 male students would have a resting heart rate of 72 or more? Are their results unusual?​