Over his career, he has made 343 of his 425 attempts in an open-air stadium and 59 of his 63 attempts in a dome.

Explain how the difference is evidence for the alternative hypothesis.

Your answer:
a	Adam Vinatieri's performance when he kicked in a dome was 87.1 percentage points greater than when he kicked in an open-air stadium.
b	Adam Vinatieri's performance when he kicked in a dome was 13percentage points greater than when he kicked in an open-air stadium.