Wrong forum,
and not really a question that can be answered with a simple yes or no (as usual). But in general, you should be pushing very wide from LP with 10 BBs or less, and not so wide from EP. However, there are factors that affect this, including antes, tightness of players left (i.e. their calling ranges), stack sizes, ante sizes etc.
See
this thread for an example of how wide you should be pushing in some circumstances.
The best way to learn pushing/calling ranges is probably to play SNGs/play with SNGWiz/SNG Power Tools (google them).