Kristi and Dan are training for an upcoming swim meet. The mean and the MAD below represent their practice time in seconds for the 50 meter free style race. Kristi's mean is 56 and MAD 3.25. Dan's mean is 53 and MAD 1. What does this information say about their practice time
a.Kisti's data varies more than Dan's
b.Dan's data varies more than Kristi's
c.Kristi practices longer than Dan
d.Dan practices longer than Kristi