Consider the following data of runners in a race. The first data is from a certain year the second one is from the year after.
$Last\space year \space|\space Mean: 525s \space|\space MAD: 25s$
$This \space year \space|\space Mean: 613s \space|\space MAD: 21s$
The question asks to make inference from the measures of variability.
The MAD this year is lower than last year, this means that more students were closer to the mean time taken to finish the race. Since the mean this year is greater than the mean last year, more students were slower this year.
I feel like this should be right, but I am not quite sure if it is the right inference from the data given.