Need help ASAP!! ...this one has me stumped! WHAT can you do with just this info?

Need help ASAP!!  ...this one has me stumped! WHAT can you do with just this info?

Choose the correct study and solve: SHOW ALL WORK!!

Ten experimental animals were subjected to conditions simulating disease.  The number of heart beats per minute, before and after the experiment, was recorded.  The mean increase (after minus before) in heart rate was 45.2 beats per minute, with a standard deviation of 26.9.