Question 2: In 'Smoking habits', what is meant by ‘n.s.’? What can we conclude from this?
This means `not significant'. The probability of getting a difference as big as this if the null hypothesis were true is greater than 0.05. We can conclude that we have failed to show that there is a difference in the population, i.e. that smoking decreases following Asthma School. We cannot conclude that there is no difference. There may be a difference which the sample is not large enough to detect.
Back to Exercise: Evaluation of a nurse-run asthma school.
To Applied Biostatistics index.
To Martin Bland's M.Sc. index.
To Martin Bland's home page.
This page maintained by Martin Bland.
Last updated: 20 October, 2006.
Back to top.