Write about mean in statistics as you’re explaining it to someone who never knew about it.
Provide 2 paragraphs that motivate the problem by describing why mean in statistics is useful. It could be that the mean in statistics itself is immediately useful in some applications or that the mean in statistics is used to build towards more complex methods that are useful in some applications. The nice thing about statistics is that somewhere down the line, it is all about the application. You should identify the application of the mean in statistics in the first paragraph or second.