Question

What does p-hat mean

Answer 1

I searched Google under the key words "p-hat statistics" to get these possible sources:

https://www.google.com/search?client=safari&rls=en&q=p-hat+statistics&ie=UTF-8&oe=UTF-8&gws_rd=ssl

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.