The Western Ontario and McMaster (WOMAC) Universities Osteoarthritis Index is widely used to assess pain, stiffness, and function in patients with osteoarthritis of the hip or knee. An excerpt of the scale is shown below:

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1. Imagine you collected the following data forquestion A1 "walking on a flat surface". Calculate one measure of central tendency and one measure of variance to summarize this data. Provide your justification for your selected choices. (3marks)

Participant	1	2	3	4	5	6	7	8	9
Rating A1	None	Severe	Severe	Extreme	Mod.	None	Mild	Mod.	Extreme
Rating Score (0-4)	0	3	3	4	2	0	1	2	4

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