I have an entirely different answer for you if I read your post differently than I did the first time...
If you mean that you created the page with an incorrect spelling and now it has been created and the URL is misspelled etc...
You can edit the page name from the edit page and that is what will display and show up in searches, but it will not change the spelling in the URL.
To do that you would need to create a new page with the correct spelling.
Cheers!