A school district’s study 5 years ago showed that the averag…

A schооl district's study 5 yeаrs аgо showed thаt the average number of special education students per grade was 12 students.   Now, the school district is considering increasing the number of special education teachers because they believe the average number of special education students per grade has significantly increased.  After running a hypothesis test, the result was reject Ho and accept Ha.  What decision should the school district make regarding increasing the number of special education teachers?