Data set Mean MAD
1 4.3 1
2 4.9 1.2
The means-to-MAD ratio is simply presenting the Mean and MAD in a fraction form wherein the Mean is the numerator and the MAD is the denominator and simplifying the fraction.
Data Set 1: 4.3/1 = 4.3
Data Set 2: 4.9/1.2 = 4.08