<p>10 applicants for every spot does not equate to a 10% acceptance rate. Remember that you still have to factor in the yield rate (the number of admitted students who accept the offer of admission). If there were 10 applicants for every spot and their yield rate is 50%, then their acceptance rate was 20%. Admissions over accepts applicants based on a projected yield. Waitlists are protection for an inaccurate yield. </p>
<p>According to boardingschoolreview which Middlesex updated on 7/30/08, their acceptance rate is 25%, so their yield must be less than 50%.</p>