“What happens if the average number of bullies at a school goes up?”/“The mean increases.”

A riddle about school bullying was posted on Reddit—Dad Jokes on September 7, 2018:
 
Q: What happens if the average number of bullies at a school goes up?
A: The mean increases.
 
The joke also refers to “mathematical mean” (an average).
 
   
Reddit—Dad Jokes
What happens if the average number of bullies at a school goes up? (self.dadjokes)
submitted September 7, 2018 by timoteostewart
The mean increases.
 
Twitter
keepingitcreel
@Keepingitcreel
What happens if the average number of bullies at a school goes up? The mean increases.
3:17 PM - 7 Sep 2018
 
Twitter
Dad Jokes
@Dadsaysjokes
What happens if the average number of bullies at a school goes up?
The mean increases.
7:27 PM - 7 Sep 2018
 
Twitter
Jake Schulte ✝️
@jschulte1314
What happens when the average number of bullies at a school goes up?
The mean increases
7:43 PM - 7 Sep 2018