What would the hypothesis be? (I know its a 2 sample test)?

An agronomist hopes that a new fertilizer she has developed will enable grape growers to increase the yield of each grapevine by more than 5 pounds. To test this fertilizer she applied it to 44 vines and used the traditional growing strategies on 47 other vines. The fertilized vines produced a mean of 58.4 pounds of grapes with a standard deviation of 3.7 pounds, while the unfertilized vines yielded an average of 52.1 pounds with a standard deviation of 3.4 pounds of grape. Do these experimental results confirm the agronomist's expectations?