Answer:
Here is an example of a dot plot (in text, did as best as I could to represent it) that matches the description you provided:
Number of Minutes Spent on Math Homework Problem
 |
10| o
 9| o
 8|
 7| o
 6|
 5| o
 4|
 3| o
 2|
 1| o
 0|___________________
 1 2 3 4 5 6 7 8 9 10
 Students
This dot plot shows the number of minutes spent on a math homework problem by ten students. The mean amount of time is represented by the dot at the y-value of 9, and the MAD (Mean Absolute Deviation) is represented by the spread of the data around the mean.