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+# Linear Regression
+
+
+
+## Statical tools
+Numpy comes with some useful statistical tools that we can use to analyze our data.
+
+### Mean
+The mean is the average of a set of numbers. It is calculated by summing all the numbers and dividing by the count of numbers.
+
+```python
+import numpy as np
+
+mean = np.mean([1, 2, 3, 4, 5])
+median = np.median([1, 2, 3, 4, 5])
+std = np.std([1, 2, 3, 4, 5])
+variance = np.var([1, 2, 3, 4, 5])
+```