Johnny and Tara are participating in a 5K run on Thanksgiving. While training for it, they take note of their average mile time the first time they run, the 5th time they run, and the 10th time they run.

Run (average mile time, min.sec) Johnny Tara First Run 9.34 9.66 (SEM +1.2) (SEM 10.98) Fifth Run 8.81 8.73 (SEM +0.28) (SEM +1.28) Tenth Run 8.13 7.72 (SEM +2.3) (SEM +1.4)