Okay, so for sample bearers, we can use our this our veterans function to get a sample difference. So, we can do something that is our veterans A. So, we get our 5.56413. So for sample virus are in Addis press that is to notice our statistic population is usually down I will say the whole data set and then our sample is actually what we call we do some of the random sample rain or those are classes temporary and to get some of the data from audit population data. So, I will say after we get some of this data from this population data, we will have a What we call sample data we can see is called a subset of these other subset data. So, for population data we need to use this formula variance A times are n minus one divided by n. So, n is the Lancer any number of sample.

So for variants for the sample data, we can use straight away our data variance function. So this is I will say the difference between the population variance and the sample variance.