Training Systems Using Python Statistical Modeling

Computing basic statistics

Now we can use the DataFrame that we created to get some basic numbers; we will use the following steps to do so:

1. We can count how much data there is through the count() method, as shown in the following screenshot:

We can see that there are 150 observations. Note that this excludes NA values (that is, missing values), so it is possible that not all of these observations will be 150.

2. We can also compute the sample mean, which is the arithmetic average of all the numbers in the dataset, by simply calling the mean() method, as shown in the following screenshot:

Here, we can see the arithmetic means for the numeric ...