Your friend tells you that there is a vending machine on campus that dispenses M&M packs that contain more red M&Ms than usual. To test this hypothesis, you buy five M&M packs from that vending machine and find that they contain 7, 5, 7, 9, and 8 red M&Ms. Then, you go to a different vending machine and buy four more packs. They contain 5, 6, 5, and 4 red M&Ms. If there is no real difference between the machines, what is the probability of these data (or something more extreme) resulting by random chance?