1000 draws are made at random from a box. The null hypothesis states that the average of the box is 40. The observed average was 41.2 and the SD was 20.
z and P approximate:

Carlos Rodriguez <carlos@math.albany.edu>
This problem was contributed by a student in Elementary Statistics. It is offered as it is with no warranty of any kind
Last modified: Wed May 13 12:29:11 EDT 1998