- The five summary statistics can be demonstrated on a box plot.

- It shows a clear visual display of how the data are spread out.

BOXPLOTS

EXAMPLE

SYMMETRIC DISTRIBUTION

NEGATIVELY SKEWED

It’s bunched data on the right, whereas the left of the box is spread out and sparse.

POSITIVELY SKEWED

TESTING YOUR KNOWLEDGE

http://content.jacplus.com.au/secure/FileViewer?resourceId=103884&category=Interactivity&pk=c109a6cbb7a51c81

HOW TO DRAW A BOXPLOT

BOXPLOT ON CAS

When one observation lies well away from other observations in a set, we call it an outlier. Sometimes an outlier occurs because data have been incorrectly obtained or misread.

OUTLIERS

TESTING YOUR KNOWLEDGE

BOX PLOTS WITH AND WITHOUT OUTLIERS USING

CAS

Let’s give it a go using your CAS

Exercise 1F-Boxplots Q’s 1-7 pg 30

CLASSWORK./HOMEWORK