Lecture 1

Question 1

What does the coefficient of variation represent?

Answer 1

The size of the SD relative to the size of the mean: i.e. SD/M.
It is useful in that it allows the variability of different scales of measurement to be compared

Question 2

What are the different ways of transforming data (so that it is more normal)?

Answer 2

1. Square root
2. Logarithm
3. Inverse