EXAM REVISIONSUMMARISING DATA

SUMMARISING DATACentre refers to the location of the middle of the distribution of a sample of size n.

QUESTION: What is the useful measures of where the centre of a set of numerical data is located?

Spread is about the variablility in a distribution

What are the three measures of spread?

MULTIPLE CHOICEEach employee receives a $10 000 increase in salary. What can be deduced about:

BOX PLOTS

What are the five summary statistics?

ANSWER THIS QUESTION IN YOUR BOOK (10 mins)

WHAT IS NORMAL???

Standard scores (or z-scores)

THIS SHOULD BE IN YOUR BOUND BOOK.