Jimmy runs fast, but he wants to run faster. He sees a commercial for a new type of sneaker that says they can make you run faster and jump higher because of how they are made. Jimmy goes and buys the new sneakers and then times how long it takes him to run one mile in his new sneakers. The next day, he puts his old sneakers back on and times how long it takes him to run one mile in his old sneakers. In his old sneakers he ran the mile in 8 minutes and 12 seconds. In his new sneakers he ran the mile in 7 minutes and 46 seconds. what is the hypothisis