Understanding Data and Distributions, statistics homework help

This is a discussion question in my class that needs to be answer with t least 100 words.

How about some examples? For instance, in which of the following might dispersion be a problem:

a supermarket customer survey?

inspection of manufactured parts for airplanes?

a survey of voters for political views?

others?

Explain why.

How might dispersion be mitigated?

Is it always desirable to mitigate dispersion? why or why not?