Joe considers himself a real card whiz because he claims to be able to pull an ace out of a regular full deck of cards at a rate better than chance.  To demonstrate, Joe would pull a single card out of the deck, record whether it was an ace or not, replace the card, shuffle, and repeat the procedure for a total of 26 trials.  Amazingly, Joe pulled an ace on 10 of the 26 trials.  Perform a Chi-Square Goodness of Fit test to see if Joe's performance is superior to that expected by chance alone.  The critical value of Chi-Square for this analysis is 3.84.

Anyone wanna help me out? I don't know where to start..