#
Suggested answer to exercise: Transformations, 10

Question 10: Using the table below, carry out an appropriate significance test.

##
Suggested answer

There are 8 zero differences and 12 differences with a sign.
There is one difference with a negative sign.
We have 1 negative and 11 positives.
Using the table, this would be significant if the number of negatives were 2 or less.
Hence we have a significant difference, P<0.05.
If we do the test exactly, we find P = 0.006.

Back to
Exercise: Transformations.

This page maintained by Martin Bland.

Last updated: 27 July, 2009.