Notes about this book

• Is hard to do sampling, if you want to take a sample of childrens, you will ended up with questions like "what is a consider a child?", do basic sampling is hard

• Do not remove putliers just because they are, consider the nature of those, some techniques are quite sensitive to outliers so use them carefully.

• Consider to revieww the axis of your plots you will have to take care of magnification or minimization of the variations

• How you present the numbers in tables have to be really careful, present the necessary to avoid bias, using percentage can be misleading in some scenarios compare with absolute numbers