how do I type " ˆ " above the characters?

[Xinwei]

Sometimes I need " ˆ " above character y or x, meaning the expected value of
y or x in statistics. How can I type in this in word 2007?

Thanks

 

[Suzanne S. Barnhill]

See http://sbarnhill.mvps.org/WordFAQs/CombineCharacters.htm