# Thread: examples of variable x of a population

1. ## examples of variable x of a population

I'm reading about Sampling Distribution of a Sample Mean and don't understand what this variable x could be. Maybe some examples of what the variable x could be will help me understand.

The book states:
"Suppose that a variable $\displaystyle x$ of a population has mean $\displaystyle \mu$ and standard deviation $\displaystyle \sigma$."

Then it goes on to list some properties that do make sense to me.

Thank you. :-)

2. X can be pretty much anything in this context, some examples:

x = a person's weight in kg
x = a person's IQ
x = The number of lottery tickets bought this month