The Private School Association conducts a survey of the outcome of private and public school students who pursue university education.

The outcome is either graduate eventually or not. It is found that:

• 60% of commencing freshmen are from public schools.

• 75% of public student students who commence their university education eventually graduate.

• 90% of private school freshmen eventually graduate.

Is there any evidence that a freshman's chance to graduate is dependent on the type of high school they attended?