Well, if you wanna do that, the population mean is usually denoted by the Greek letter mu. So the population mean is usually denoted by the Greek letter mu. And so in a lot of statistics, it's calculating a sample mean in an attempt to estimate this thing that you might not know, the population mean. And these calculations on the entire population, sometimes you might be able to do it, oftentimes you will not be able to do it, these are called parameters. This is called parameters. So what you're going to find in much of statistics, it's all about calculating statistics for a sample, finding these sample statistics in order to estimate parameters for an entire population. Now, the last thing I wanna do is introduce you to some of the notation that you might see in a statistics textbook that looks very mathy and very difficult.