= Minimum sample size needed to assume Normality =

The pdf here from [[http://www2.psychology.uiowa.edu/faculty/mordkoff/GradStats/part%201/I.07%20normal.pdf | here]] is available from [[attachment:norms_size.pdf | here]] if the link is broken.

The below extract taken from the above link suggests that 30 observations is sufficient to make the assumption of a Normal distribution tenable.
 
“In general, it is said that Central Limit Theorem “kicks in” at an N of about 30. In other words, as long as the sample is based on 30 or mote observations, the sampling distribution of the mean can be safely assumed to be normal”