And even then sometimes successful parents can have unseccussful students or sucessful students can come from unseccuesfull parents.
My parents while they have everything they need both barely graduated high school. My wife's parents neither made it though high school. We both have made it through college so in that sense we are more successful.
Its the student that has to want to be successful and that will be the biggest factor in their outcome. There have been many successful people who made it with nothing and there have been many unsuccessful people whom had everything handed to them.